01Major Cloud Providers主流云厂商7▾

Google Cloud Platform↗

• App Engine – 28 frontend instance hours per day, nine backend instance hours per dayApp Engine —— 每天 28 个前端实例小时、9 个后端实例小时
• Cloud Firestore – 1GB storage, 50,000 reads, 20,000 writes, 20,000 deletes per dayCloud Firestore —— 1 GB 存储，每天 50,000 次读、20,000 次写、20,000 次删除
• Compute Engine – 1 non-preemptible e2-micro, 30GB HDD, 5GB snapshot storage (restricted to certain regions), 1 GB network egress from North America to all region destinations (excluding China and Australia) per monthCompute Engine —— 1 台不可抢占的 e2-micro、30 GB 硬盘、5 GB 快照存储（限特定区域），每月 1 GB 从北美到各区域目的地的出网流量（不含中国与澳大利亚）
• Cloud Storage – 5GB, 1GB network egressCloud Storage —— 5 GB，1 GB 出网流量
• Cloud Shell – Web-based Linux shell/primary IDE with 5GB of persistent storage. 60-hour limit per weekCloud Shell —— 基于 Web 的 Linux shell 与主力 IDE，含 5 GB 持久存储。每周限 60 小时
• Cloud Pub/Sub – 10GB of messages per monthCloud Pub/Sub —— 每月 10 GB 消息
• Cloud Functions – 2 million invocations per month (includes both background and HTTP invocations)Cloud Functions —— 每月 200 万次调用（含后台调用与 HTTP 调用）
• Cloud Run – 2 million requests per month, 360,000 GB-seconds memory, 180,000 vCPU-seconds of compute time, 1 GB network egress from North America per monthCloud Run —— 每月 200 万次请求、360,000 GB-秒内存、180,000 vCPU-秒计算时间，每月 1 GB 从北美出网流量
• Google Kubernetes Engine – No cluster management fee for one zonal cluster. Each user node is charged at standard Compute Engine pricingGoogle Kubernetes Engine —— 一个区域集群不收集群管理费。每个用户节点按 Compute Engine 标准价格计费
• BigQuery – 1 TB of querying per month, 10 GB of storage each monthBigQuery —— 每月 1 TB 查询量与每月 10 GB 存储
• Cloud Build – 120 build-minutes per dayCloud Build —— 每天 120 分钟构建时长
• Google Colab↗
  Free Jupyter Notebooks development environment.免费的 Jupyter Notebooks 开发环境。
• Kaggle↗
  Jupyter Notebooks with 4 CPU cores and 30 GB RAM computational environment without any weekly usage limits. With Phone number verification, 1 Nvidia Tesla P100 GPU or 2x Nvidia Tesla T4 GPU can be added with a usage limit of 30 GPU hours/week for free. With Identity verification – 1 TPU v3-8 with 96 CPU cores and 330 GB RAM is available with a usage limit of 20 hours/week for free. Check Technical Specifications for more details.具备 4 个 CPU 核心与 30 GB 内存计算环境的 Jupyter Notebooks，无每周使用限制。通过手机号验证，可免费加配 1 块 Nvidia Tesla P100 GPU 或 2 块 Nvidia Tesla T4 GPU，限每周 30 GPU 小时。通过身份验证，可免费使用 1 个 TPU v3-8（96 个 CPU 核心与 330 GB 内存），限每周 20 小时。详见技术规格。
• ChromeRemoteDesktop↗
  Free remote desktop app with practically no limit on the number of devices, owned by Google, so needs a Google account.免费远程桌面应用，设备数量几乎没有限制。由 Google 提供，因此需要 Google 账号。
• Google AI Studio↗
  Get free access to Gemini 3.5 Flash, Gemini 3 Flash and Gemma 4 models. The free tier for Flash offers 5 requests per minute, 20 requests per day, and 250k input tokens per minute. Meanwhile the free tier for Gemma 4 offers 30 requests per minute, 14.4k requests per day, but (only) 16k input tokens per minute.免费使用 Gemini 3.5 Flash、Gemini 3 Flash 与 Gemma 4 模型。Flash 的免费套餐为每分钟 5 次请求、每天 20 次请求，每分钟 25 万输入 token。Gemma 4 的免费套餐为每分钟 30 次请求、每天 14,400 次请求，但每分钟仅 1.6 万输入 token。
• Full, detailed list – https://cloud.google.com/free完整详细清单 —— https://cloud.google.com/free

Amazon Web Services↗

• CloudFront↗
  1TB egress/month, 10M HTTP requests, and 2M Function invocations/month每月 1 TB 出网流量、1,000 万次 HTTP 请求、200 万次函数调用
• CloudWatch↗
  10 custom metrics and alarms, 1M API requests, 5GB of log data ingestion and 5GB of log data archive10 个自定义指标与告警、100 万次 API 请求、5 GB 日志写入与 5 GB 日志归档
• CodeBuild↗
  100min of build time/month每月 100 分钟构建时长
• CodeCommit↗
  5 active users, 5k repositories/account, 50GB storage/month and 10K requests/month5 名活跃用户、每账号 5,000 个仓库、每月 50 GB 存储与每月 1 万次请求
• CodePipeline↗
  1 active pipeline/month每月 1 条活跃流水线
• DynamoDB↗
  25GB NoSQL DB25 GB NoSQL 数据库
• Lambda↗
  1 million requests/month每月 100 万次请求
• SNS↗
  1 million publishes/month每月 100 万次发布
• SES↗
  3.000 messages/month (6mo)每月 3,000 条消息（6 个月）
• SQS↗
  1 million messaging queue requests100 万次消息队列请求
• Full, detailed list – https://aws.amazon.com/free/完整详细清单 —— https://aws.amazon.com/free/

Microsoft Azure↗

• App Service↗
  10 web, mobile, or API apps (60 CPU minutes/day)10 个 Web、移动端或 API 应用（每天 60 CPU 分钟）
• Functions↗
  1 million requests per month每月 100 万次请求
• DevTest Labs↗
  Enable fast, easy, and lean dev-test environments提供快速、简单且轻量的开发测试环境
• Active Directory↗
  500,000 objects500,000 个对象
• Active Directory B2C↗
  50,000 monthly stored users每月存储 50,000 名用户
• Azure DevOps↗
  5 active users, unlimited private Git repos5 名活跃用户，无限私有 Git 仓库
• Azure Pipelines↗
  10 free parallel jobs with unlimited minutes for open source for Linux, macOS, and Windows10 个免费并行任务，开源项目不限构建分钟数，支持 Linux、macOS 与 Windows
• Microsoft IoT Hub↗
  8,000 messages per day每天 8,000 条消息
• Load Balancer↗
  750 hours, 15GB data processing and 5 rules (12mo)750 小时、15 GB 数据处理与 5 条规则（12 个月）
• Notification Hubs↗
  1 million push notifications100 万条推送通知
• Bandwidth↗
  15GB Outbound(12mo)15 GB 出网流量（12 个月）
• Cosmos DB↗
  25GB storage and 1000 RUs of provisioned throughput25 GB 存储与 1,000 RU 预置吞吐
• Static Web Apps↗
  Build, deploy, and host static apps and serverless functions with free SSL, Authentication/Authorization, and custom domains构建、部署并托管静态应用与无服务器函数，含免费 SSL、认证与授权能力以及自定义域名
• Storage↗
  100GB LRS transactions (Azure Files), 5GB Blob storage, 10GB LRS Archive Storage, 2x64GB SSD (12mo)100 GB LRS 事务（Azure Files）、5 GB Blob 存储、10 GB LRS 归档存储、2×64 GB SSD（12 个月）
• Cognitive Services↗
  AI/ML APIs (Computer Vision, Translator, Face detection, Bots, etc) with free tier including limited transactionsAI/ML API（计算机视觉、翻译、人脸检测、机器人等），免费套餐含有限的调用次数
• Cognitive Search↗
  AI-based search and indexation service, free for 10,000 documents基于 AI 的搜索与索引服务，10,000 份文档以内免费
• Azure Kubernetes Service↗
  Managed Kubernetes service, free cluster management托管 Kubernetes 服务，集群管理免费
• Event Grid↗
  100K ops/month每月 10 万次操作
• Service Bus↗
  750 hours and 13 million operations Standard tier base unit (12mo)750 小时与 1,300 万次操作的标准层基础额度（12 个月）
• Full, detailed list – https://azure.microsoft.com/free/完整详细清单 —— https://azure.microsoft.com/free/

Oracle Cloud↗

• Compute计算
• 2 AMD-based Compute VMs with 1/8 OCPU and 1 GB memory each2 台基于 AMD 的计算虚拟机，各 1/8 OCPU 与 1 GB 内存
• 2 Arm-based Ampere A1 cores and 12 GB of memory usable as one VM or up to 2 VMs2 个基于 Arm 的 Ampere A1 核心与 12 GB 内存，可用作 1 台或最多 2 台虚拟机
• Instances will be reclaimed when deemed idle实例在被判定为空闲时会被回收
• Block Volume – 2 volumes, 200 GB total (used for compute)块存储卷 —— 2 块卷、共 200 GB（用于计算）
• Object Storage – 10 GB对象存储 —— 10 GB
• Load balancer – 1 instance with 10 Mbps负载均衡 —— 1 个实例，10 Mbps
• Databases – 2 DBs, 20 GB each数据库 —— 2 个数据库，各 20 GB
• Monitoring – 500 million ingestion data points, 1 billion retrieval datapoints监控 —— 5 亿个写入数据点与 10 亿个读取数据点
• Bandwidth – 10 TB egress per month, speed limited to 50 Mbps on x64-based VM, 500 Mbps * core count on ARM-based VM带宽 —— 每月 10 TB 出网流量，x64 虚拟机限速 50 Mbps，ARM 虚拟机为 500 Mbps × 核心数
• Public IP – 2 IPv4 for VMs, 1 IPv4 for load balancer公网 IP —— 虚拟机 2 个 IPv4，负载均衡 1 个 IPv4
• Notifications – 1 million delivery options per month, 1000 emails sent per month通知 —— 每月 100 万次投递选项，每月发送 1,000 封邮件
• Full, detailed list – https://www.oracle.com/cloud/free/完整详细清单 —— https://www.oracle.com/cloud/free/

IBM Cloud↗

• Cloudant database – 1 GB of data storageCloudant 数据库 —— 1 GB 数据存储
• Db2 database – 100MB of data storageDb2 数据库 —— 100 MB 数据存储
• API Connect – 50,000 API calls per monthAPI Connect —— 每月 50,000 次 API 调用
• Availability Monitoring – 3 million data points per month可用率监控 —— 每月 300 万个数据点
• Log Analysis – 500MB of daily log日志分析 —— 每天 500 MB 日志
• Full, detailed list – https://www.ibm.com/cloud/free/完整详细清单 —— https://www.ibm.com/cloud/free/

Cloudflare↗

• Application Services↗
  Free DNS for an unlimited number of domains, DDoS Protection, CDN along with free SSL, Firewall rules and page rules, WAF, Bot Mitigation, Free Unmetered Rate Limiting – 1 rule per domain, Analytics, Email forwarding不限域名的免费 DNS、DDoS 防护、CDN 与免费 SSL、防火墙规则与页面规则、WAF、机器人缓解、免费不限量限流（每域名 1 条规则）、分析、邮件转发
• Zero Trust & SASE↗
  Up to 50 Users, 24 hours of activity logging, three network locations最多 50 名用户、24 小时活动日志，3 个网络位置。
• Cloudflare Tunnel↗
  You can expose locally running HTTP port over a tunnel to a random subdomain on trycloudflare.com use Quick Tunnels, No account required. More features (TCP tunnel, Load balancing, VPN) in Zero Trust Free Plan.你可以使用 Quick Tunnels，通过隧道把本地运行的 HTTP 端口暴露到 trycloudflare.com 的随机子域上，无需账号。更多功能（TCP 隧道、负载均衡、VPN）见 Zero Trust 免费方案。
• Workers↗
  Deploy serverless code for free on Cloudflare’s global network-100k daily requests.在 Cloudflare 全球网络上免费部署无服务器代码 —— 每天 10 万次请求。
• Workers KV↗
  100k read requests per day, 1000 write requests per day, 1000 delete requests per day, 1000 list requests per day, 1 GB stored data每天 10 万次读请求、1,000 次写请求、1,000 次删除请求、1,000 次列表请求，1 GB 存储数据
• R2↗
  10 GB per month, 1 million Class A operations per month, 10 million Class B operations per month每月 10 GB，每月 100 万次 Class A 操作、1,000 万次 Class B 操作
• D1↗
  5 million rows read per day, 100k rows written per day, 1 GB storage每天读取 500 万行、写入 10 万行，1 GB 存储
• Pages↗
  Develop and deploy your web apps on Cloudflare’s fast, secure global network. Five hundred monthly builds, 100 custom domains, Integrated SSL, unlimited accessible seats, unlimited preview deployments, and full-stack capability via Cloudflare Workers integration.在 Cloudflare 快速安全的全球网络上开发并部署 Web 应用。每月 500 次构建、100 个自定义域名、集成 SSL、不限坐席、不限预览部署，并通过 Cloudflare Workers 集成实现全栈能力。
• Queues↗
  1 million operations per month每月 100 万次操作
• TURN↗
  1TB of free (outgoing) traffic per month.每月 1 TB 免费（出网）流量。

Zoho↗

Started as an e-mail provider but now provides a suite of services, some of which have free plans. List of services having free plans :起初是邮件服务商，如今提供一整套服务，其中部分有免费计划。以下是含免费计划的服务清单：

• Catalyst by Zoho↗
  PaaS/full-stack cloud platform with a generous free tierPaaS 与全栈云平台，提供慷慨的免费套餐
• Zoho Apptics↗
  Unified and actionable product analytics to monitor performance, analyze user behavior and collect feedback for mobile, web, and desktop apps with generous Free Forever plan.统一且可执行的产品分析，为移动端、Web 与桌面应用监控性能、分析用户行为并收集反馈，提供慷慨的永久免费方案。
• Email↗
  Free for 5 users. 5GB/user & 25 MB attachment limit, one domain.5 名用户免费。每人 5 GB 存储与 25 MB 附件上限，支持 1 个域名。
• Zoho Assist↗
  Zoho Assist’s forever free plan includes one concurrent remote support license and Access to 5 unattended computer licenses for unlimited duration available for both professional and personnel use.Zoho Assist 的永久免费方案包含 1 个并发远程支持许可，以及 5 个不限时长的无人值守计算机许可，专业与个人用途均可用。
• Sprints↗
  Free for 5 users,5 Projects & 500MB storage.5 名用户、5 个项目与 500 MB 存储免费。
• Docs↗
  Free for 5 users with 1 GB upload limit & 5GB storage. Zoho Office Suite (Writer, Sheets & Show) comes bundled.5 名用户免费，含 1 GB 上传上限与 5 GB 存储。附带 Zoho Office Suite（Writer、Sheets 与 Show）。
• Projects↗
  Free for 3 users, 2 projects & 10 MB attachment limit. The same plan applies to Bugtracker.3 名用户、2 个项目与 10 MB 附件上限免费。同一计划也适用于 Bugtracker。
• Connect↗
  Team Collaboration free for 25 users with three groups, three custom apps, 3 Boards, 3 Manuals, and 10 Integrations along with channels, events & forums.面向 25 名用户的免费团队协作，含 3 个群组、3 个自定义应用、3 个看板、3 本手册与 10 个集成，以及频道、事件与论坛。
• Meeting↗
  Meetings with upto 3 meeting participants & 10 Webinar attendees.会议最多 3 名参会者与 10 名网络研讨会观众。
• Vault↗
  Password Management is accessible for Individuals.面向个人开放密码管理。
• Showtime↗
  Yet another Meeting software for training for a remote session of up to 5 attendees.又一款会议软件，用于远程培训，最多 5 名参会者。
• Notebook↗
  A free alternative to Evernote.Evernote 的免费替代品。
• Wiki↗
  Free for three users with 50 MB storage, unlimited pages, zip backups, RSS & Atom feed, access controls & customizable CSS.3 名用户免费，含 50 MB 存储、无限页面、zip 备份、RSS 与 Atom 订阅、访问控制与可定制 CSS。
• Subscriptions↗
  Recurring Billing management free for 20 customers/subscriptions & 1 user with all the payment hosting done by Zoho. The last 40 subscription metrics are stored定期计费管理，20 名客户与订阅以及 1 名用户免费，全部支付托管由 Zoho 完成。保留最近 40 项订阅指标
• Checkout↗
  Product Billing management with 3 pages & up to 50 payments.产品计费管理，含 3 个页面与最多 50 笔支付。
• Desk↗
  Customer Support management with three agents, private knowledge base, and email tickets. Integrates with Assist for one remote technician & 5 unattended computers.客户支持管理，含 3 名坐席、私有知识库与邮件工单。可与 Assist 集成，提供 1 名远程技术人员与 5 台无人值守电脑。
• Cliq↗
  Team chat software with 100 GB storage, unlimited users, 100 users per channel & SSO.团队聊天软件，含 100 GB 存储、不限用户、每频道 100 名用户与 SSO。
• Campaigns↗
  Email Marketing邮件营销
• Forms↗
  Form Creator表单创建器
• Sign↗
  Paperless Signatures无纸化签名
• Surveys↗
  Online Surveys在线问卷
• Bookings↗
  Appointment Scheduling预约排程

02Cloud management solutions云管理方案7▾

Brainboard↗

Collaborative solution to visually build and manage cloud infrastructures from end-to-end.可视化端到端构建与管理云基础设施的协作方案。

Cloud 66↗

Free for personal projects (includes one deployment server, one static site), Cloud 66 gives you everything you need to build, deploy, and grow your applications on any cloud without the headache of the “server stuff.”.个人项目免费（含 1 台部署服务器与 1 个静态站点）。Cloud 66 提供在任何云上构建、部署与扩展应用所需的一切，无需为服务器运维头疼。

Cloud Cost Analyzer↗

Scan AWS and Azure for cost waste with 92 automated checks including idle NAT gateways, gp2 volumes, and over-provisioned instances. Get savings estimates in a read-only, developer-first CLI. Free tier covers up to 5,000 resources per scan on one AWS account. Paid tiers add resource IDs and exact remediation steps.通过 92 项自动化检查扫描 AWS 与 Azure 的成本浪费，包括空闲 NAT 网关、gp2 卷与规格过大的实例。在只读、开发者优先的 CLI 中获取节省估算。免费套餐每次扫描覆盖一个 AWS 账号上最多 5,000 个资源。付费档位可查看资源 ID 与精确修复步骤。

deployment.io↗

Deployment.io helps developers automate deployments on AWS. On our free tier, a developer (single user) can deploy unlimited static sites, web services, and environments. We provide 10 job executions free per month with previews and auto-deploys included in the free tier.Deployment.io 帮助开发者自动化 AWS 上的部署。在免费套餐中，1 名开发者（单用户）可部署不限量静态站点、Web 服务与环境。每月免费提供 10 次任务执行，免费套餐含预览与自动部署。

Parsivex↗

Parsivex scans your AWS account for idle EC2, unattached EBS, oversized RDS, stale snapshots, NAT gateway overuse etc. Free tier provides a monthly scan for one AWS account and returns total monthly waste plus a category breakdown. Paid plans give access to itemized findings and scheduled re-scans.Parsivex 扫描你的 AWS 账号，找出空闲 EC2、未挂载 EBS、规格过大的 RDS、陈旧快照、NAT 网关过度使用等。免费套餐为 1 个 AWS 账号提供每月一次扫描，返回每月浪费总额与分类明细。付费计划可查看逐项发现与定时重扫。

Pulumi↗

Modern infrastructure as a code platform that allows you to use familiar programming languages and tools to build, deploy, and manage cloud infrastructure.现代基础设施即代码平台，可用你熟悉的编程语言与工具构建、部署并管理云基础设施。

scalr.com↗

Scalr is a Terraform Automation and COllaboration (TACO) product used to better collaboration and automation on infrastructure and configurations managed by Terraform. Full Terraform CLI support, OPA integration, and a hierarchical configuration model. No SSO tax. All features are included. Use up to 50 runs/month for free.Scalr 是 Terraform 自动化与协作（TACO）产品，用于更好地协作与自动化由 Terraform 管理的基础设施与配置。完整支持 Terraform CLI、集成 OPA，并提供层级化配置模型。不收取 SSO 税，所有功能都包含在内。每月最多 50 次运行免费。

03Source Code Repos源代码托管12▾

Bitbucket↗

Unlimited public and private Git repos for up to 5 users with Pipelines for CI/CD最多 5 名用户的公开与私有 Git 仓库不限量，并含用于 CI/CD 的 Pipelines。

Codeberg↗

Unlimited public and private Git repos for free and open-source projects (with unlimited collaborators). Powered by Forgejo. Static website hosting with Codeberg Pages. CI/CD hosting with Codeberg’s CI. Translating hosting with Codeberg Translate. Includes Package and Container hosting, Project management, and Issue Tracking面向免费与开源项目的公开及私有 Git 仓库不限量（协作者不限量）。由 Forgejo 驱动。通过 Codeberg Pages 提供静态网站托管，通过 Codeberg’s CI 提供 CI/CD 托管，通过 Codeberg Translate 提供翻译托管。包含软件包与容器托管、项目管理与问题跟踪。

framagit.org↗

Framagit is the software forge of Framasoft based on the Gitlab software includes CI, Static Pages, Project pages and Issue tracking.Framagit 是 Framasoft 基于 GitLab 打造的软件托管平台，包含 CI、静态页面、项目页面与缺陷跟踪。

GitGud↗

Unlimited private and public repositories. Free forever. Powered by GitLab & Sapphire. Includes CI/CD, Static Hosting, Container Registry, Project Management and Issue Tracking.私有与公开仓库数量不限，永久免费。由 GitLab 与 Sapphire 驱动。包含 CI/CD、静态托管、容器镜像仓库、项目管理与问题跟踪。

GitHub↗

Unlimited public repositories and unlimited private repositories (with unlimited collaborators). Includes CI/CD, Development Environment, Static Hosting, Package and Container hosting, Project management and AI Copilot公开仓库不限量，私有仓库亦不限量（协作者不限量）。包含 CI/CD、开发环境、静态托管、软件包与容器托管、项目管理以及 AI Copilot。

gitlab.com↗

Unlimited public and private Git repos with up to 5 collaborators. Includes CI/CD, Static Hosting, Container Registry, Project Management and Issue Tracking公开与私有 Git 仓库不限量，协作者最多 5 人。包含 CI/CD、静态托管、容器镜像仓库、项目管理与问题跟踪。

heptapod.net↗

Heptapod is a friendly fork of GitLab Community Edition providing support for MercurialHeptapod 是 GitLab 社区版的友好分支，提供对 Mercurial 的支持

pijul.com↗

Unlimited free and open source distributed version control system. Its distinctive feature is based on a sound theory of patches, which makes it easy to learn, use, and distribute. Solves many problems of git/hg/svn/darcs.不限量的免费开源分布式版本控制系统。其独特之处在于基于严谨的补丁理论，因而易于学习、使用与分发，并解决了 git/hg/svn/darcs 的诸多问题。

projectlocker.com↗

One free private project (Git and Subversion) with 50 MB of space1 个免费私有项目（Git 与 Subversion），50 MB 空间

RocketGit↗

Repository Hosting based on Git. Unlimited Public and private repositories.基于 Git 的仓库托管。公开与私有仓库均不限量。

savannah.gnu.org↗

Serves as a collaborative software development management system for free Software projects (for GNU Projects)作为免费软件项目（GNU 项目）的协作式软件开发管理系统

savannah.nongnu.org↗

Serves as a collaborative software development management system for free Software projects (for non-GNU projects)作为免费软件项目（非 GNU 项目）的协作式软件开发管理系统

04APIs, Data, and MLAPI、数据与机器学习138▾

Abstract API↗

API suite for various use cases, including IP geolocation, phone number validation, or email validation.覆盖多种场景的 API 套件，包括 IP 地理定位、手机号校验与邮箱校验。

AlphaAI↗

Financial news API and MCP server. Every article gets per-ticker impact analysis, a category, and a 1-10 relevance score, and SEC Form 4 insider filings are turned into scored events. The free tier includes 20 requests per minute and 100 requests per day on both REST and MCP, no card required.金融新闻 API 与 MCP server。每篇文章都会获得按股票代码的影响分析、分类与 1 至 10 的相关性评分，SEC Form 4 内部人申报也会被转成带评分的事件。免费套餐在 REST 与 MCP 上均为每分钟 20 次、每天 100 次请求，无需信用卡。

AnyHook↗

Inbound webhook relay: point a Stripe, GitHub or LINE bot webhook at it and it stores each event before delivering to your handler, retries automatically when your endpoint is down, and keeps a log you can replay from. Endpoints can be created from the API with no account. Free plan includes 3,000 events/month, 1 app, 3 retries and 3 days of retention, no credit card.入站 Webhook 中继：把 Stripe、GitHub 或 LINE 机器人的 Webhook 指过来，它会在投递到你的处理程序前先存储每条事件，当你的端点宕机时自动重试，并保留可重放的日志。可通过 API 创建端点，无需账号。免费计划含每月 3,000 条事件、1 个应用、3 次重试与 3 天保留，无需信用卡。

Apify↗

Web scraping and automation platform to create an API for any website and extract data. Ready-made scrapers, integrated proxies, and custom solutions. Free plan with $5 platform credits included every month.网页抓取与自动化平台，可为任意网站创建 API 并提取数据。提供现成抓取器、集成代理与定制方案。免费方案每月赠送 5 美元平台额度。

APITemplate.io↗

Auto-generate images and PDF documents with a simple API or automation tools like Zapier & Airtable. No CSS/HTML is required. The free plan comes with 50 images/month and three templates.用简单 API 或 Zapier、Airtable 等自动化工具自动生成图片与 PDF 文档，无需 CSS/HTML。免费计划含每月 50 张图片与 3 个模板。

APIVerve↗

Get instant access to over 120+ APIs for free, built with quality, consistency, and reliability in mind. The free plan covers up to 50 API Tokens per month. (Possibly taken down, 2025-06-25)免费即时访问 120 多个 API，以质量、一致性与可靠性为核心打造。免费计划每月最多 50 个 API Token。（可能已于 2025-06-25 下架）

Beeceptor↗

No-code, cloud-based platform for mocking and debugging multi-protocol APIs (REST, SOAP, gRPC & GraphQL), providing instant servers with rules-based logic, CRUD & stateful mocking, proxying, and CORS management for faster integration and testing. The free plan includes 50 requests per day and provides a public dashboard/endpoint where anyone with the dashboard URL can view submitted requests and responses.基于云的无代码平台，用于 Mock 与调试多协议 API（REST、SOAP、gRPC 与 GraphQL），提供带规则逻辑的即时服务器、CRUD 与有状态 Mock、代理与 CORS 管理，加速集成与测试。免费计划每天 50 次请求，并提供公开仪表盘与端点，任何持有仪表盘 URL 的人都能查看提交的请求与响应。

BigDataCloud↗

Provides fast, accurate, and free (Unlimited or up to 10K-50K/month) APIs for modern web like IP Geolocation, Reverse Geocoding, Networking Insights, Email and Phone Validation, Client Info and more.为现代 Web 提供快速、准确且免费（不限量或每月最多 1 万至 5 万次）的 API，如 IP 地理定位、逆地理编码、网络洞察、邮箱与手机号校验、客户端信息等。

Brave Search API↗

Independent web, news, image, video search and AI/LLM context API, suitable for RAG pipelines and AI agents. Free tier includes $5 in monthly credits (credit card required for verification).独立的网页、新闻、图片、视频搜索与 AI 与 LLM 上下文 API，适合 RAG 流水线与 AI 智能体。免费套餐每月含 5 美元额度（验证需信用卡）。

Browse AI↗

Extracting and monitoring data on the web. 1k credits per month for free, equals 1k concurrent requests.在 Web 上提取与监控数据。每月免费 1,000 额度，相当于 1,000 次并发请求。

Calendarific↗

Enterprise-grade Public holiday API service for over 200 countries. The free plan includes 500 calls per month.覆盖 200 多个国家的企业级公共假日 API 服务。免费计划每月 500 次调用。

Canopy↗

GraphQL API for Amazon.com product, search, and category data. The free plan includes 100 calls per month.面向 Amazon.com 商品、搜索与分类数据的 GraphQL API。免费计划每月 100 次调用。

CarAPI.dev↗

Comprehensive automotive data API with VIN decoding, stolen vehicle checks, vehicle valuation, inspection data, and more. Free tier includes 100 requests/month across all 9 endpoints.全面的汽车数据 API，含 VIN 解码、被盗车辆查询、车辆估值、检测数据等。免费套餐含全部 9 个端点每月共 100 次请求。

CatchDoms↗

Aggregator of expired and dropping domain listings from 16 marketplaces, with SEO enrichment (backlinks, Trust Flow, Wayback history) and a quality score. Free plan: 10 unlocked listings, 5 favorites, 3 saved searches. 7-day Pro trial on signup includes full REST API and MCP server access.聚合来自 16 个交易市场的过期与待删除域名列表，并附带 SEO 增强信息（外链、Trust Flow、Wayback 历史）与质量评分。免费计划：10 条解锁列表、5 个收藏、3 个已保存搜索。注册后享 7 天 Pro 试用，含完整 REST API 与 MCP server 访问。

Cloudmersive↗

Utility API platform with full access to expansive API Library including Document Conversion, Virus Scanning, and more with 600 calls/month, North America AZ only, 2.5MB maximum file size.实用型 API 平台，可完整访问内容丰富的 API 库，包括文档转换、病毒扫描等；每月 600 次调用，仅限北美可用区，单文件最大 2.5MB。

CometML↗

The MLOps platform for experiment tracking, model production management, model registry, and complete data lineage, covering your workflow from training to production. Free for individuals and academics.用于实验跟踪、模型生产管理、模型注册表与完整数据血缘的 MLOps 平台，覆盖从训练到生产的完整工作流。对个人与学术用户免费。

Commerce Layer↗

Composable commerce API that can build, place, and manage orders from any front end. The developer plan allows 100 orders per month and up to 1,000 SKUs for free.可组合商务 API，可从任意前端构建、下单与管理订单。开发者计划每月免费支持 100 笔订单与最多 1,000 个 SKU。

Composio↗

Integration platform for AI Agents and LLMs. Integrate over 200+ tools across the agentic internet.面向 AI 智能体与 LLM 的集成平台。可在智能体互联网上集成 200 多个工具。

Conversion Tools↗

Online File Converter for documents, images, video, audio, and eBooks. REST API is available. Libraries for Node.js, PHP, Python. Support files up to 50 GB (for paid plans). The free tier is limited by file size (20MB) and number of conversions (30/Day, 300/Month).面向文档、图片、视频、音频与电子书的在线文件转换器。提供 REST API 以及 Node.js、PHP、Python 库。支持最大 50 GB 的文件（付费计划）。免费套餐受文件大小（20 MB）与转换次数（每天 30 次、每月 300 次）限制。

Country-State-City Microservice API↗

API and Microservice to provides a wide range of information including countries, regions, provinces, cities, postal codes, and much more. The free tier includes up to 100 requests per day.提供国家、地区、省份、城市、邮政编码等广泛信息的 API 与微服务。免费套餐每天最多 100 次请求。

Coupler↗

Data integration tool that syncs between apps. It can create live dashboards and reports, transform and manipulate values, and collect and back up insights. The free plan is limited to one user, data connection, data source, and data destination. Also requires manual data refresh.应用间同步的数据集成工具。可创建实时仪表盘与报表、转换与处理数值，并收集与备份洞察。免费计划限 1 名用户、1 个数据连接、1 个数据源与 1 个数据目标，且需手动刷新数据。

CraftMyPDF↗

Auto-Generate PDF documents from reusable templates with a drop-and-drop editor and a simple API. The free plan comes with 100 PDFs/month and three templates.通过可复用模板、拖拽编辑器与简单 API 自动生成 PDF 文档。免费计划含每月 100 份 PDF 与 3 个模板。

Cube↗

Cube helps data engineers and application developers access data from modern data stores, organize it into consistent definitions, and deliver it to every application. The fastest way to use Cube is with Cube Cloud, which has a free tier limited to 1,000 queries per day.Cube 帮助数据工程师与应用开发者访问现代数据存储中的数据，整理成统一定义并交付给每个应用。使用 Cube 最快的方式是 Cube Cloud，其免费套餐每天限 1,000 次查询。

CurlHub↗

Proxy service for inspecting and debugging API calls. The free plan includes 10,000 requests per month.用于检查与调试 API 调用的代理服务。免费计划每月 10,000 次请求。

CurrencyScoop↗

Realtime currency data API for fintech apps. The free plan includes 5,000 calls per month.面向金融科技应用的实时货币数据 API。免费计划每月 5,000 次调用。

CustomJS↗

HTML to PDF or PDF to PNG/Text & PDF merging/extraction/merging APIs. Free tier has 600 calls a month.HTML 转 PDF，或以 PDF 转 PNG 与文本，以及 PDF 合并、抽取与拼接 API。免费套餐每月 600 次调用。

Data Fetcher↗

Connect Airtable to any application or API with no code. Postman-like interface for running API requests in Airtable. Pre-built integrations with dozens of apps. The free plan includes 100 runs per month.无需代码即可把 Airtable 连接到任意应用或 API。类 Postman 界面，可在 Airtable 中运行 API 请求。预置数十个应用的集成。免费计划每月 100 次运行。

Dataimporter.io↗

Tool for connecting, cleaning, and importing data into Salesforce. Free Plan includes up to 20,000 records per month.用于连接、清洗并向 Salesforce 导入数据的工具。免费方案含每月最多 20,000 条记录。

Datalore↗

Python notebooks by Jetbrains. Includes 10 GB of storage and 120 hours of runtime each month.JetBrains 出品的 Python notebook。每月含 10 GB 存储与 120 小时运行时长。

DB Designer↗

Cloud-based Database schema design and modeling tool with a free starter plan of 2 Database models and ten tables per model.基于云的数据库 Schema 设计与建模工具，免费入门计划含 2 个数据库模型、每个模型 10 张表。

DB-IP↗

Free IP geolocation API with 1k request per IP per day.lite database under the CC-BY 4.0 License is free too.免费 IP 地理定位 API，每个 IP 每天 1,000 次请求。CC-BY 4.0 许可下的 lite 数据库也免费。

DeepAR↗

Augmented reality face filters for any platform with one SDK. The free plan provides up to 10 monthly active users (MAU) and tracks up to 4 faces用一套 SDK 为任意平台提供增强现实人脸滤镜。免费计划提供最多 10 名月活用户（MAU）并最多跟踪 4 张人脸

Deepnote↗

A new data science notebook. Jupyter is compatible with real-time collaboration and running in the cloud. The free tier includes unlimited personal projects, unlimited basic machines with 5GB RAM and 2vCPU, and teams with up to 3 editors.新一代数据科学 notebook。与 Jupyter 兼容，支持实时协作与云端运行。免费套餐含无限个人项目、无限的基础机型（5 GB 内存 + 2 vCPU），以及最多 3 名编辑者的团队。

Compare JSON↗

An online tool for comparing differences between two JSON data structures, helping you quickly locate the differences in JSON data.在线比较两个 JSON 数据结构差异的工具，帮助你快速定位 JSON 数据中的差异。

Disease.sh↗

A free API providing accurate data for building the Covid-19 related useful Apps.免费 API，提供准确数据用于构建 COVID-19 相关的实用应用。

Doczilla↗

SaaS API empowering the generation of screenshots or PDFs directly from HTML/CSS/JS code. The free plan allows 250 documents month.支持直接从 HTML、CSS、JS 代码生成截图或 PDF 的 SaaS API。免费计划每月 250 份文档。

Doppio↗

Managed API to generate and privately store PDFs and Screenshots using top rendering technology. The free plan allows 400 PDFs and Screenshots per month.托管 API，使用顶级渲染技术生成并私密存储 PDF 与截图。免费计划每月 400 份 PDF 与截图。

DocPenny↗

HTML to PDF document generation with templates, webhook delivery, and credit-based pricing. Free plan with 50 monthly credits, no credit card required.HTML 转 PDF 文档生成，支持模板、Webhook 投递与基于额度的计费。免费计划每月 50 额度，无需信用卡。

Doqlo↗

Bulk fill and mail merge PDF forms from CSV using the web app or Public API. The free plan includes 100 output PDFs/month.使用 Web 应用或公开 API 从 CSV 批量填写并合并 PDF 表单。免费计划含每月 100 份输出 PDF。

DynamicDocs↗

Generate PDF documents with JSON to PDF API based on LaTeX templates. The free plan allows 50 API calls per month and access to a library of templates.基于 LaTeX 模板的 JSON 转 PDF API，用于生成 PDF 文档。免费计划每月 50 次 API 调用，并可使用模板库。

Earnings Feed↗

Real-time SEC filings, insider trades, and institutional holdings API. Free tier includes 15 requests per minute.实时 SEC 申报、内部人交易与机构持仓 API。免费套餐每分钟 15 次请求。

Estuary↗

Real-time data integration platform for CDC, streaming, and batch data integration with 200+ managed connectors. Free plan includes 10 GB/month of data movement and up to 2 connector instances, with no time limit and no credit card required.面向 CDC、流式与批量数据集成的实时数据集成平台，含 200 多个托管连接器。免费计划每月 10 GB 数据流转与最多 2 个连接器实例，无时间限制且无需信用卡。

Export SDK↗

PDF generator API with drag-and-drop template editor that provides an SDK and no-code integrations. The free plan has 250 monthly pages, unlimited users, and three templates.PDF 生成器 API，含拖拽式模板编辑器，提供 SDK 与无代码集成。免费计划每月 250 页、不限用户与 3 个模板。

Financial Data↗

Stock market and financial data API. Free plan allows 300 requests per day.股市与金融数据 API。免费计划每天 300 次请求。

finlight↗

Real-time financial news API with entity resolution (tickers, ISIN) and sentiment tagging, available over REST, WebSocket, webhooks and an MCP server. Free tier: 5,000 requests/month on both REST and MCP, 12-hour delayed articles, no card required.实时金融新闻 API，具备实体识别（股票代码、ISIN）与情绪标注，可通过 REST、WebSocket、Webhook 与 MCP server 访问。免费套餐：REST 与 MCP 均每月 5,000 次请求，文章延迟 12 小时，无需信用卡。

Firecrawl↗

API that crawls websites and converts them into clean, LLM-ready markdown or structured data, handling JavaScript rendering, proxies, and rate limits. The free plan includes 1,000 credits per month with no credit card required.抓取网站并转换为干净、适配 LLM 的 Markdown 或结构化数据的 API，可处理 JavaScript 渲染、代理与限流。免费计划每月 1,000 额度，无需信用卡。

flaky↗

A mock API where you can paste your JSON and simulate API problems like delays, errors, failed requests, and malformed responses. 1,000 requests per day without a key, or 10,000 requests per day with a free key. There is no paid tier.Mock API，可粘贴 JSON 并模拟延迟、错误、请求失败、响应畸形等 API 问题。无密钥每天 1,000 次请求，使用免费密钥每天 1 万次。没有付费档位。

Formfeed↗

API for PDF and image generation from JSON with a simple API or automation tools like Zapier & Make. The free plan includes 100 free PDF conversions per month.由 JSON 生成 PDF 与图片的 API，可用简单 API 或 Zapier、Make 等自动化工具调用。免费计划每月 100 次免费 PDF 转换。

FraudLabs Pro↗

Screen an order transaction for credit card payment fraud. This REST API will detect all possible fraud traits based on the input parameters of an order. The Free Micro plan has 500 transactions per month.为信用卡支付欺诈筛查订单交易。该 REST API 会根据订单输入参数检测所有可能的欺诈特征。免费微型计划每月 500 笔交易。

FreeIPAPI↗

Free, Fast and Reliable IP Geolocation API for commercial and non-commercial users available in JSON面向商用与非商用用户的免费、快速且可靠的 IP 地理定位 API，提供 JSON 格式

Geolocated.io↗

IP Geolocation API with multi-continent servers, offering a free plan with 2,000 requests per day.多大陆服务器的 IP 地理定位 API，提供每天 2,000 次请求的免费计划。

Hex↗

a collaborative data platform for notebooks, data apps, and knowledge libraries. Free community tier with up to five projects.面向笔记本、数据应用与知识库的协作式数据平台。免费社区档最多 5 个项目。

Hook0↗

Hook0 is an open-source Webhooks-as-a-service (WaaS) that makes it easy for online products to provide webhooks. Dispatch up to 100 events/day with seven days of history retention for free.Hook0 是开源的 Webhook 即服务（WaaS），让在线产品轻松提供 Webhook 能力。每天免费派发最多 100 条事件，历史保留七天。

Hoppscotch↗

A free, fast, and beautiful API request builder.免费、快速且美观的 API 请求构建器。

HS Ping↗

A multi-country HS (Harmonized System) and HTS (Harmonized Tariff System) code lookup API, with a free plan offering 100 lookups/day.多国 HS（协调制度）与 HTS（协调关税制度）编码查询 API，免费计划每天 100 次查询。

huggingface.co↗

Build, train, and deploy NLP models for Pytorch, TensorFlow, and JAX. Free up to 30k input characters/mo.为 Pytorch、TensorFlow 与 JAX 构建、训练并部署 NLP 模型。每月最多 3 万输入字符免费。

Insomnia↗

Open-source API client for designing and testing APIs, it supports REST and GraphQL用于设计与测试 API 的开源 API 客户端，支持 REST 与 GraphQL

Inngest↗

Durable execution and event-driven workflows for TypeScript, Python, and Go. Hobby plan is free with 50k executions/month, 5 concurrent steps, 500k events ingested, and no credit card required.面向 TypeScript、Python 与 Go 的持久化执行与事件驱动工作流。Hobby 计划免费，每月 5 万次执行、5 个并发步骤、写入 50 万条事件，无需信用卡。

Invantive Cloud↗

Access over 70 (cloud)platforms such as Exact Online, Twinfield, ActiveCampaign or Visma using Invantive SQL or OData4 (typically Power BI or Power Query). Includes data replication and exchange. Free plan for developers and implementation consultants. Free for specific platforms with limitations in data volumes.通过 Invantive SQL 或 OData4（通常配合 Power BI 或 Power Query）访问 70 多个（云）平台，如 Exact Online、Twinfield、ActiveCampaign 或 Visma。含数据复制与交换。为开发者与实施顾问提供免费计划；部分平台免费但数据量有限制。

IP Geolocation API by ipwho.org↗

2,000 free requests per day. Fast, enterprise grade API at non-enterprise prices. Trusted by developers, corporate, government and education clients. Servers in 12+ regions.每天 2,000 次免费请求。以非企业级价格提供快速的企业级 API，受开发者、企业、政府与教育客户信赖。服务器分布于 12 个以上区域。

IP Geolocation API↗

IP Geolocation API from Abstract – Allows 1,000 free requests.来自 Abstract 的 IP 地理定位 API —— 允许 1,000 次免费请求。

IP Geolocation↗

IP Geolocation API – Forever free plan for developers with a 1,000 requests per day limit.IP 地理定位 API —— 面向开发者的永久免费计划，每天限 1,000 次请求。

ip-api↗

IP Geolocation API, Free for non-commercial use, no API key required, limited to 45 req/minute from the same IP address for the free plan.IP 地理定位 API，非商业使用免费，无需 API 密钥，免费计划下同一 IP 限每分钟 45 次请求。

IP.City↗

100 Free IP geolocation requests per day每天 100 次免费 IP 地理定位请求

IP2Location.io↗

Freemium, fast, and reliable IP geolocation API. Get data like city, coordinates, ISP, ASN, AS data and more. The free plan includes 50k credits per month. IP2Location.io also offers 500 free WHOIS and hosted domain lookups per month. See domain registration details and find domains hosted on a specific IP. Upgrade to a paid plan for more features.免费增值、快速且可靠的 IP 地理定位 API。可获取城市、坐标、ISP、ASN、AS 数据等信息。免费计划每月含 5 万额度。IP2Location.io 每月还提供 500 次免费 WHOIS 与托管域名查询。可查看域名注册详情，并找出托管在特定 IP 上的域名。升级付费计划可获更多功能。

Proxmint GeoIP↗

Free IP → country/city/ASN JSON API, no key, CORS-open. MaxMind GeoLite2.免费的 IP 转国家、城市与 ASN 的 JSON API，无需密钥，开放 CORS。数据来自 MaxMind GeoLite2。

ip2geo.dev↗

IP geolocation API to convert IP addresses into location data including city, country, timezone, ASN, and currency. The free plan includes 1,000 requests per month.把 IP 地址转换为位置数据的 IP 地理定位 API，包括城市、国家、时区、ASN 与货币。免费计划每月 1,000 次请求。

ipaddress.sh↗

Simple service to get a public IP address in different formats.以不同格式获取公网 IP 地址的简单服务。

ipapi.is↗

A reliable IP Address API from Developers for Developers with the best Hosting Detection capabilities that exist. The free plan offers 1000 lookups without signup.由开发者打造、服务开发者的可靠 IP 地址 API，具备同类中最佳的托管检测能力。免费计划无需注册即可查询 1,000 次。

ipapi↗

IP Address Location API by Kloudend, Inc – A reliable geolocation API built on AWS, trusted by Fortune 500. The free tier offers 30k lookups/month (1k/day) without signup.Kloudend 公司的 IP 地址定位 API —— 构建在 AWS 上、受财富 500 强信赖的可靠地理定位 API。免费套餐无需注册即可每月查询 3 万次（每天 1,000 次）。

ipbase.com↗

IP Geolocation API – Forever free plan that spans 150 monthly requests.IP 地理定位 API —— 永久免费计划，每月共 150 次请求。

IPinfo↗

Fast, accurate, and free (up to 50k/month) IP address data API. Offers APIs with details on geolocation, companies, carriers, IP ranges, domains, abuse contacts, and more. All paid APIs can be trialed for free.快速、准确且免费的（每月最多 5 万次）IP 地址数据 API。提供地理定位、公司、运营商、IP 段、域名、滥用联系人等详细信息的 API。所有付费 API 均可免费试用。

IPLocate↗

IP Geolocation API, free up to 1,000 requests/day. Includes proxy/VPN/hosting detection, ASN data, IP to Company, and more. IPLocate also offers free downloadable IP to Country and IP to ASN databases in CSV or GeoIP-compatible MMDB formats.IP 地理定位 API，每天最多 1,000 次请求免费。含代理、VPN 与托管检测、ASN 数据、IP 转公司等。IPLocate 还提供可免费下载的 IP 转国家与 IP 转 ASN 数据库（CSV 或兼容 GeoIP 的 MMDB 格式）。

IPTrace↗

An embarrassingly simple API that provides your business with reliable and helpful IP geolocation data with 50,000 free lookups per month.一款简单到极致的 API，为你的业务提供可靠实用的 IP 地理定位数据，每月 50,000 次免费查询。

JSON IP↗

Returns the Public IP address of the client it is requested from. No registration is required for the free tier. Using CORS, data can be requested using client-side JS directly from the browser. Useful for services monitoring change in client and server IPs. Unlimited Requests.返回发起请求客户端的公网 IP 地址。免费套餐无需注册。借助 CORS，可直接在浏览器中用客户端 JS 请求数据。适合监控客户端与服务器 IP 变化的服务。请求不限量。

JSON to Table↗

Convert JSON into an interactive table for quick viewing, editing, and sharing online.把 JSON 转成可交互表格，便于在线快速查看、编辑与分享。

JSON2Video↗

A video editing API to automate video marketing and social media videos, programmatically or with no code.视频编辑 API，可用编程方式或无代码方式自动化视频营销与社交媒体视频制作。

JSONing↗

Create a fake REST API from a JSON object, and customize HTTP status codes, headers, and response bodies.由 JSON 对象创建假的 REST API，并可自定义 HTTP 状态码、响应头与响应体。

Labelixa↗

Zebra ZPL label rendering and validation API and browser viewer. Free tier includes an anonymous rendering quota and barcode generation with no watermark, no card required.Zebra ZPL 标签渲染与校验 API 及浏览器查看器。免费档包含匿名渲染额度与无水印条形码生成，无需信用卡。

LayerCall↗

Fraud and trust scoring for an IP, email, phone, domain or device in one call, plus authorization and Web Bot Auth verification for AI agents. 1,000 lookups/month free, no card required.一次调用即可获取 IP、邮箱、手机号、域名或设备的欺诈与信任评分，并为 AI 智能体提供授权与 Web Bot Auth 验证。每月 1,000 次查询免费，无需信用卡。

LoginLlama↗

A login security API to detect fraudulent and suspicious logins and notify your customers. Free for 1,000 logins per month.登录安全 API，用于识别欺诈与可疑登录并通知你的客户。每月 1,000 次登录免费。

Market Data API↗

Provides real-time and historical financial data for stocks, options, mutual funds, and more. The Free Forever API tier allows for 100 daily API requests at no charge.提供股票、期权、共同基金等的实时与历史金融数据。永久免费 API 档位每天可免费发出 100 次 API 请求。

Maxim AI↗

Simulate, evaluate, and observe your AI agents. Maxim is an end-to-end evaluation and observability platform, helping teams ship their AI agents reliably and >5x faster. Free forever for indie developers and small teams (3 seats).模拟、评估并观测你的 AI 智能体。Maxim 是端到端的评估与可观测平台，帮助团队可靠且提速 5 倍以上地交付 AI 智能体。面向独立开发者与小团队（3 个席位）永久免费。

microlink.io↗

It turns any website into data such as metatags normalization, beauty link previews, scraping capabilities, or screenshots as a service. 50 requests per day, every day free.把任意网站转成数据，例如元标签规范化、精美链接预览、抓取能力或截图即服务。每天 50 次请求，天天免费。

Mintlify↗

Modern standard for API documentation. Beautiful and easy-to-maintain UI components, in-app search, and interactive playground. Free for 1 editor.现代化的 API 文档标准。提供美观易维护的 UI 组件、应用内搜索与交互式演练场。1 名编辑免费。

MockAPI↗

MockAPI is a simple tool that lets you quickly mock up APIs, generate custom data, and perform operations using a RESTful interface. MockAPI is meant to be a prototyping/testing/learning tool. One project/2 resources per project for free.MockAPI 是简单工具，可快速 Mock API、生成自定义数据并通过 RESTful 接口执行操作。MockAPI 定位为原型、测试与学习工具。免费 1 个项目与每项目 2 个资源。

Mockerito↗

Free mock REST API service providing realistic data across 9 domains (e-commerce, finance, healthcare, education, recruitment, social media, stock markets, weather, and aviation). No mandatory signup, no API keys, unlimited requests. Perfect for frontend prototyping, API testing, learning and teaching web development.免费 Mock REST API 服务，提供覆盖 9 个领域（电商、金融、医疗、教育、招聘、社交媒体、股市、天气与航空）的拟真数据。无需强制注册、无需 API 密钥、请求不限量。非常适合前端原型、API 测试以及 Web 开发的教学与学习。

Mockfly↗

Mockfly is a trusted development tool for API mocking and feature flag management. Quickly generate and control mock APIs with an intuitive interface. The free tier offers 500 requests per day.Mockfly 是值得信赖的 API Mock 与功能开关管理开发工具。可通过直观界面快速生成并控制 mock API。免费套餐每天 500 次请求。

Mocko.dev↗

Proxy your API, choose which endpoints to mock in the cloud and inspect traffic, for free. Speed up your development and integration tests.代理你的 API，在云端选择要 Mock 的端点并检查流量，免费。加速你的开发与集成测试。

Multi-Exit IP Address Checker↗

A free and simple tool to check your exit IP address across multiple nodes and understand how your IP appears to different global regions and services. Useful for testing rule-based DNS splitting tools such as Control D.免费而简单的工具，可跨多个节点检查你的出口 IP 地址，了解你的 IP 在不同全球区域与服务中的呈现方式。适用于测试基于规则的 DNS 分流工具（如 Control D）。

NASdisks Drive Data API↗

Free, no-key, CORS-enabled API for NAS HDD/SSD specifications, per-model CMR/SMR classification, and annualized failure rates derived from Backblaze Drive Stats. Returns JSON or CSV, CC BY 4.0, no signup.免费的免密钥、开放 CORS API，提供 NAS 硬盘与 SSD 规格、各型号的 CMR 与 SMR 分类，以及基于 Backblaze Drive Stats 推算的年化故障率。返回 JSON 或 CSV，CC BY 4.0，无需注册。

News API↗

Search news on the web with code, and get JSON results. Developers get 100 queries free each day. Articles have a 24 hour delay.用代码在网络上搜索新闻并获取 JSON 结果。开发者每天免费 100 次查询。文章延迟 24 小时。

OCR.Space↗

An OCR API parses image and pdf files that return the text results in JSON format. 25,000 requests per month are free and a 1MB file size limit.OCR API，解析图片与 PDF 文件并以 JSON 返回文本结果。每月 25,000 次请求免费，单文件上限 1 MB。

OpenAPI3 Designer↗

Visually create Open API 3 definitions for free.免费以可视化方式创建 Open API 3 定义。

Parseur↗

20 free pages/month: Extract data from PDFs, emails. AI powered. Full API access.每月 20 页免费额度：从 PDF、邮件中提取数据。AI 驱动，提供完整 API 访问。

PDF-API.io↗

PDF Automation API, visual template editor or HTML to PDF, dynamic data integration, and PDF rendering with an API. The free plan comes with one template, 100 PDFs/month.PDF 自动化 API，含可视化模板编辑器或 HTML 转 PDF、动态数据集成，以及通过 API 渲染 PDF。免费计划含 1 个模板与每月 100 份 PDF。

PDFBolt↗

Developer-focused PDF generation API designed with privacy in mind. It offers Stripe-inspired documentation and includes 500 free PDF conversions per month.注重隐私的开发者向 PDF 生成 API。文档风格灵感来自 Stripe，每月含 500 次免费 PDF 转换。

Pexafy↗

Semantic image search API across 9 free photo sources (Unsplash, Pexels, Pixabay, Kaboompics & more), 9M+ photos under one JSON schema instead of one integration per source. Plain-language queries, reverse image search, filters on color, orientation and license. CORS is open on read endpoints, so it runs from the browser. The free plan includes 5,000 API requests/month and 1 key, no app review.覆盖 9 个免费图库（Unsplash、Pexels、Pixabay、Kaboompics 等）的语义图片搜索 API，900 万张以上照片统一在一个 JSON schema 下，无需逐个图库做集成。支持自然语言查询、以图搜图，以及按颜色、方向与许可筛选。读取端点开放 CORS，可直接在浏览器中运行。免费计划每月 5,000 次 API 请求与 1 个密钥，无需应用审核。

Pixela↗

Free daystream database service. All operations are performed by API. Visualization with heat maps and line graphs is also possible.免费的 daystream 数据库服务。所有操作都通过 API 完成，也可用热力图与折线图做可视化。

Posthook↗

Schedule webhooks to fire at a future time with automatic retries, delivery tracking, and failure alerting. Free plan includes 1,000 webhooks per month.让 Webhook 在未来某个时间触发，具备自动重试、投递跟踪与失败告警。免费计划每月 1,000 个 Webhook。

Postman↗

Simplify workflows and create better APIs – faster – with Postman, a collaboration platform for API development. Use the Postman App for free forever. Postman cloud features are also free forever with certain limits.用面向 API 开发的协作平台 Postman 简化工作流并更快地打造更好的 API。Postman App 永久免费使用。Postman 云端功能在一定限制下也永久免费。

PrefectCloud↗

A complete platform for dataflow automation. Free plan includes 5 deployed workflows and 500 minutes of serverless compute credits per month.数据流自动化完整平台。免费计划含 5 个已部署工作流与每月 500 分钟无服务器计算额度。

Preset Cloud↗

A hosted Apache Superset service. Forever free for teams of up to 5 users, featuring unlimited dashboards and charts, a no-code chart builder, and a collaborative SQL editor.托管式 Apache Superset 服务。最多 5 人的团队永久免费，含无限仪表盘与图表、无代码图表构建器与协作式 SQL 编辑器。

ProxySentry↗

IP API that detects residential proxies and VPNs. ProxySentry.io offers a free tier with 10k requests per month on rapidapi.com.可识别住宅代理与 VPN 的 IP API。ProxySentry.io 在 rapidapi.com 上提供每月 1 万次请求的免费套餐。

Publora↗

Publishing API: post or schedule to 10 social networks with one HTTPS call, or from an AI agent over MCP. Free forever: 15 posts/month, 3 connected accounts, all networks except X.发布 API：一次 HTTPS 调用即可发布或定时发布到 10 个社交网络，也可由 AI 智能体通过 MCP 调用。永久免费：每月 15 条帖子、3 个已连接账号，除 X 外的全部网络可用。

Reducto↗

Turn any unstructured documents (PDF, XLSX, JPG, PPTX, etc.) into structured JSON data. Parse, extract data, and edit PDF forms. Free tier with 15k free credits and pay-as-you-go.将任意非结构化文档（PDF、XLSX、JPG、PPTX 等）转换为结构化 JSON 数据。可解析、提取数据并编辑 PDF 表单。免费档含 1.5 万免费额度，之后按量付费。

Rendi↗

FFmpeg API – A REST API for FFmpeg, run FFmpeg online without handling the infrastructure. Free tier with monthly processing quota and 4 vCPUs available.FFmpeg API —— FFmpeg 的 REST API，无需自建基础设施即可在线运行 FFmpeg。免费套餐含每月处理额度与 4 个 vCPU。

RequestBin.com↗

Create a free endpoint to which you can send HTTP requests. Any HTTP requests sent to that endpoint will be recorded with the associated payload and headers so you can observe recommendations from webhooks and other services.创建一个可接收 HTTP 请求的免费端点。发送到该端点的任何请求都会被记录请求体与请求头，便于观察 Webhook 与其他服务的推送内容。

Simplescraper↗

Trigger your webhook after each operation. The free plan includes 100 cloud scrape credits.在每次操作后触发你的 Webhook。免费方案含 100 次云端抓取额度。

Geekflare API↗

Geekflare API lets you scrape websites into Markdown, take screenshots, perform TLS scans and DNS lookups, test load times, and more. The free plan offers 500 API credits per month (e.g., 500 DNS lookups, 250 web scrapes, or 100 screenshots). See credit mapping.Geekflare API 可把网站抓取为 Markdown、截图、执行 TLS 扫描与 DNS 查询、测试加载时间等。免费计划每月 500 个 API 额度（例如 500 次 DNS 查询、250 次网页抓取或 100 张截图）。见额度对照表。

SmartParse↗

SmartParse is a data migration and CSV to API platform that offers time- and cost-saving developer tools. The Free tier includes 300 Processing Units per month, Browser uploads, Data quarantining, Circuit breakers, and Job Alerts.SmartParse 是数据迁移与 CSV 转 API 平台，提供省时省钱的开发者工具。免费套餐每月含 300 个处理单元、浏览器上传、数据隔离、熔断与任务告警。

Sofodata↗

Create secure RESTful APIs from CSV files. Upload a CSV file and instantly access the data via its API allowing faster application development. The free plan includes 2 APIs and 2,500 API calls per month. You don’t need a credit card.从 CSV 文件创建安全的 RESTful API。上传 CSV 后即可通过 API 访问数据，加快应用开发。免费计划含 2 个 API 与每月 2,500 次 API 调用，无需信用卡。

Svix↗

Webhooks as a Service. Send up to 50,000 messages/month for free.Webhook 即服务。每月最多免费发送 50,000 条消息。

Tavily AI↗

API for online search and rapid insights and comprehensive research, with the capability of organization of research results. 1000 request/month for the Free tier with No credit card required.用于在线搜索、快速洞察与综合研究的 API，并支持整理研究结果。免费套餐每月 1,000 次请求，无需信用卡。

TemplateFox↗

PDF generation API with a visual template editor, dynamic data merging, and SDKs for 7 languages. Free plan includes 60 PDFs/month and 3 templates.PDF 生成 API，含可视化模板编辑器、动态数据合并与 7 种语言的 SDK。免费计划含每月 60 份 PDF 与 3 个模板。

The IP API↗

IP Geolocation API with 1000 free requests / day. Provides information about the location of an IP address, including country, city, region, and more.每天 1,000 次免费请求的 IP 地理定位 API。提供 IP 地址的位置信息，包括国家、城市、地区等。

timezone.io↗

Current time, UTC offset and DST for any time zone or IP address, compatible with the shut-down WorldTimeAPI (clients only change the host). Free with no API key or sign-up, 60 requests/minute per IP, over HTTPS or plain HTTP.查询任意时区或 IP 地址的当前时间、UTC 偏移与夏令时，兼容已停服的 WorldTimeAPI（客户端只需更换 host）。免费且无需 API 密钥或注册，每 IP 每分钟 60 次请求，支持 HTTPS 与明文 HTTP。

TinyMCE↗

rich text editing API. Core features are free for unlimited usage.富文本编辑 API。核心功能免费且使用不限量。

Tomorrow.io Weather API↗

Offers free plan of weather API. Provides accurate and up-to-date weather forecasting with global coverage, historical data and weather monitoring solutions.提供天气 API 的免费计划。以全球覆盖提供准确及时的天气预报，以及历史数据与天气监控方案。

Treblle↗

Treblle helps teams build, ship, and govern APIs. With advanced API log aggregation, observability, docs, and debugging. You get all features for free, but there is a limit of up to 250k requests per month on the free tier.Treblle 帮助团队构建、交付与治理 API，提供高级 API 日志聚合、可观测性、文档与调试能力。你可以免费使用全部功能，但免费档每月请求上限为 25 万次。

Trophy↗

Trophy is the gamification layer for consumer apps. Use pre-built APIs and open-source UI components to ship achievements, streaks, points, leaderboards and more. Free for up to 1,000 monthly active users.Trophy 是面向消费级应用的游戏化层。使用现成 API 与开源 UI 组件即可交付成就、连续打卡、积分、排行榜等功能。月活跃用户不超过 1,000 时免费。

UniRateAPI↗

Real-time exchange rates for 590+ currencies and crypto. Unlimited API calls on the free plan, perfect for developers and finance apps.覆盖 590 多种货币与加密货币的实时汇率。免费计划 API 调用不限量，非常适合开发者与金融应用。

URLpipe↗

Read any page after its JavaScript runs: Markdown, screenshots, metadata, console errors and Lighthouse audits. Free 1000 credits per month.在页面 JavaScript 执行后读取任意页面：Markdown、截图、元数据、控制台错误与 Lighthouse 审计。每月免费 1,000 额度。

vatcheckapi.com↗

Simple and free VAT number validation API. 150 free validations per month.简单免费的增值税号校验 API。每月 150 次免费校验。

vatnode↗

EU VAT number validation REST API with VIES and national tax-registry fallback, returning the official VIES consultation number for audit records. Free tier of 100 validations/month, no credit card.欧盟增值税号校验 REST API，支持 VIES 与国家税务登记处回退，并返回官方 VIES 查询编号以便留档审计。免费套餐每月 100 次校验，无需信用卡。

WeatherXu↗

Global weather data including current conditions, hourly and daily forecasts, and weather alerts via our API. Integrating AI models and ML systems to analyze and combine multiple weather models to deliver improved forecast accuracy. Free tier includes 10,000 API calls/month.全球天气数据，包括实况、逐小时与逐日预报以及天气预警。通过融合多个天气模型与 AI/ML 分析提升预报准确度。免费套餐每月 10,000 次 API 调用。

Webhooker↗

Webhook gateway hosted in Germany. Signature verification, retries, dead letter queue and replay. Free plan: 10,000 events per month.托管于德国的 Webhook 网关。支持签名校验、重试、死信队列与重放。免费方案：每月 10,000 个事件。

WebScraping.AI↗

Simple Web Scraping API with built-in parsing, Chrome rendering, and proxies. Two thousand free API calls per month.简单的网页抓取 API，内置解析、Chrome 渲染与代理。每月 2,000 次免费 API 调用。

Weights & Biases↗

The developer-first MLOps platform. Build better models faster with experiment tracking, dataset versioning, and model management. Free tier for personal projects only, with 100 GB of storage included.开发者优先的 MLOps 平台。通过实验跟踪、数据集版本管理与模型管理，更快构建更好的模型。免费档仅限个人项目，含 100 GB 存储。

What Is My IP↗

A free service to check your public IPv4 and IPv6 address and related request data through an API with different output formats for automation, scripts, and network troubleshooting.免费服务，可通过 API 查询你的公网 IPv4/IPv6 地址及相关请求数据，提供多种输出格式，便于自动化、脚本与网络排查。

What The Diff↗

AI-powered code review assistant. The free plan has a limit of 25,000 monthly tokens (~10 PRs).AI 代码评审助手。免费计划每月上限 25,000 token（约 10 个 PR）。

XFlux↗

X/Twitter read REST API (profiles, search, timelines) plus account monitors. Free tier: 1,000 API calls/month, 1 monitor, instant API key. HTTP webhooks on paid plans from $19/mo.X/Twitter 只读 REST API（资料、搜索、时间线）外加账号监控。免费档：每月 1,000 次 API 调用、1 个监控、即时获取 API key。HTTP Webhook 属付费方案，起价每月 19 美元。

wolfram.com↗

Built-in knowledge-based algorithms in the cloud.云端内置基于知识的算法。

wrapapi.com↗

Turn any website into a parameterized API. 30k API calls per month.将任意网站转换为带参数的 API。每月 3 万次 API 调用。

Zipcodebase↗

Free Zip Code API, access to Worldwide Postal Code Data. 5,000 free requests/month.免费邮政编码 API，可访问全球邮政数据。每月 5,000 次免费请求。

Zuplo↗

Free API Management platform to design, build, and deploy APIs to the Edge. Add API Key authentication, rate limiting, developer documentation and Monetization to any API in minutes. OpenAPI-native and fully-programmable with web standard apis & Typescript. The free plan offers up to 10 projects, unlimited production edge environments, 1M monthly requests, and 10GB egress.免费 API 管理平台，可在边缘设计、构建并部署 API。几分钟内为任意 API 加上 API Key 认证、限流、开发者文档与变现能力。原生支持 OpenAPI，可用 Web 标准 API 与 TypeScript 完全编程。免费计划提供最多 10 个项目、不限生产边缘环境、每月 100 万次请求与 10 GB 出网流量。

Metashot↗

Open Graph (OG) social preview image generation API. Generate dynamic 1200×630 images for Twitter, LinkedIn and Facebook via URL params, edge-cached on Cloudflare Workers. Free tier: 1,000 renders/month. Paid plans from $12/month.Open Graph（OG）社交预览图生成 API。可通过 URL 参数为 Twitter、LinkedIn 与 Facebook 生成动态的 1200×630 图片，在 Cloudflare Workers 上做边缘缓存。免费套餐：每月 1,000 次渲染。付费计划每月 12 美元起。

Tinyfish↗

Free web search and fetch API with rate limits.免费网页搜索与抓取 API，带速率限制。

05Artifact Repos制品仓库6▾

Gemfury↗

Private and public artifact repos for Maven, PyPi, NPM, Go Module, Nuget, APT, and RPM repositories. Free for public projects.面向 Maven、PyPi、NPM、Go Module、Nuget、APT 与 RPM 仓库的私有与公开制品库。公开项目免费。

jitpack.io↗

Maven repository for JVM and Android projects on GitHub, free for public projects.面向 GitHub 上 JVM 与 Android 项目的 Maven 仓库，公开项目免费。

paperspace↗

Build & scale AI models, Develop, train, and deploy AI applications, free plan: public projects, 5Gb storage, basic instances.构建与扩展 AI 模型，开发、训练并部署 AI 应用。免费计划：公开项目、5 GB 存储、基础实例。

RepoFlow↗

RepoFlow Simplifies package management with support for npm, PyPI, Docker, Go, Helm, and more. Try it for free with 10GB storage, 10GB bandwidth, 100 packages, and unlimited users in the cloud, or self-hosted for personal use only.RepoFlow 通过支持 npm、PyPI、Docker、Go、Helm 等简化软件包管理。云端可免费试用，含 10 GB 存储、10 GB 带宽、100 个软件包与不限用户；也可自托管但仅限个人使用。

RepoForge↗

Private cloud-hosted repository for Python, Debian, NPM packages and Docker registries. Free plan for open source/public projects.面向 Python、Debian、NPM 包与 Docker 仓库的私有云托管仓库。为开源与公开项目提供免费计划。

repsy.io↗

1 GB Free private/public Maven Repository.1 GB 免费私有/公开 Maven 仓库。

06Tools for Teams and Collaboration团队协作工具80▾

3Cols↗

A free cloud-based code snippet manager for personal and collaborative code.免费的云端代码片段管理器，支持个人与协作场景。

BookmarkOS.com↗

Free all-on-one bookmark manager, tab manager, and task manager in a customizable online desktop with folder collaboration.免费的一体化书签管理器、标签页管理器与任务管理器，位于可定制的在线桌面中，并支持文件夹协作。

Braid↗

Chat app designed for teams. Free for public access group, unlimited users, history, and integrations. also, it provides a self-hostable open-source version.为团队设计的聊天应用。公开访问群组免费，不限用户、历史与集成。此外还提供可自托管的开源版本。

Calendly↗

Calendly is the tool for connecting and scheduling meetings. The free plan provides 1 Calendar connection per user and Unlimited sessions. Desktop and Mobile apps are also offered.Calendly 是连接与安排会议的工具。免费计划为每位用户提供 1 个日历连接与不限会议数，也提供桌面与移动端 App。

cally.com↗

Find the perfect time and date for a meeting. Simple to use, works great for small and large groups.为会议找到最合适的时间与日期。使用简单，适合小团队与大型群组。

cDox↗

Private document editor hosted in Canada. Write, format, collaborate, and publish documents with clean public links. Data is never used for AI training. Free plan includes 50 MB storage, up to 3 public links, and export to PDF, Word, and Markdown.托管在加拿大的私有文档编辑器。可撰写、排版、协作并发布文档，生成干净的公开链接。数据永不用于 AI 训练。免费计划含 50 MB 存储、最多 3 个公开链接，并可导出 PDF、Word 与 Markdown。

Chanty.com↗

Chanty is another alternative to Slack. It has a free forever plan for small teams (up to 10) with unlimited public and private conversations, searchable history, unlimited 1:1 audio calls, unlimited voice messages, ten integrations, and 20 GB storage per team.Chanty 是 Slack 的另一款替代品。为小团队（最多 10 人）提供永久免费计划，含不限公开与私有会话、可搜索历史、不限 1 对 1 语音通话、不限语音消息、10 个集成与每团队 20 GB 存储。

DevToolLab↗

Online developer tools offering free access to all basic tools, with the ability to auto save one entry per tool, standard processing speed, and community support.在线开发者工具，免费开放所有基础工具，每件工具可自动保存 1 条记录，标准处理速度，并提供社区支持。

Discord↗

Chat with public/private rooms. Markdown text, voice, video, and screen sharing capabilities. Free for unlimited users.支持公开与私有房间的聊天，具备 Markdown 文本、语音、视频与屏幕共享能力。不限用户免费。

Dubble↗

Free Step-by-Step Guide creator. Take screenshots, document processes and collaborate with your team. Also supports async screen recording.免费的分步指南创建器。可截图、记录流程并与团队协作，还支持异步录屏。

Duckly↗

Talk and collaborate in real time with your team. Pair programming with IDE, terminal sharing, voice, video, and screen sharing. Free for small teams.与团队实时交流协作。支持结对编程、终端共享、语音、视频与屏幕共享。小型团队免费。

element.io↗

A decentralized and open-source communication tool built on Matrix. Group chats, direct messaging, encrypted file transfers, voice and video chats, and easy integration with other services.构建在 Matrix 之上的去中心化开源通信工具。支持群聊、私信、加密文件传输、语音与视频通话，并易于与其他服务集成。

evernote.com↗

Tool for organizing information. Share your notes and work together with others信息整理工具。分享你的笔记并与他人协作。

Fibery↗

Connected workspace platform. Free for single users, up to 2 GB disk space.互联工作区平台。单用户免费，最多 2 GB 磁盘空间。

Fibo↗

A free online realtime scrum poker tool for agile teams that lets unlimited members estimate story points for faster planning.面向敏捷团队的免费在线实时 Scrum 扑克工具，不限成员数，更快估算故事点。

Fizzy↗

Kanban-based platform for project management and issue tracking. Create public boards, set up webhooks, use card stamping, and track unlimited users – free for up to 1000 items.基于看板的项目管理与缺陷跟踪平台。可创建公开看板、设置 Webhook、使用卡片盖章，并跟踪不限用户——最多 1,000 个条目免费。

flat.social↗

Interactive customizable spaces for team meetings & happy hours socials. Unlimited meetings, free up to 8 concurrent users.面向团队会议与团建社交的交互式可定制空间。会议不限量，最多 8 名并发用户免费。

flock.com↗

A faster way for your team to communicate. Free Unlimited Messages, Channels, Users, Apps & Integrations让团队沟通更快的工具。免费含无限消息、频道、用户、应用与集成

GhostChat↗

Privacy-first live chat widget for websites (~15KB, no cookies, no tracking). Free plan includes 1 site, unlimited messages, a built-in AI chatbot (25 replies/mo), 30-day history, Gmail threading, canned responses and push notifications. No credit card required.面向网站的隐私优先在线聊天组件（约 15 KB，无 Cookie、无追踪）。免费计划含 1 个站点、不限消息、内置 AI 聊天机器人（每月 25 条回复）、30 天历史、Gmail 会话串联、预设回复与推送通知。无需信用卡。

GitBook↗

Platform for capturing and documenting technical knowledge – from product docs to internal knowledge bases and APIs. Free plan for individual developers.用于沉淀与记录技术知识的平台——从产品文档到内部知识库与 API。为独立开发者提供免费计划。

GitDailies↗

Daily reports of your team’s Commit and Pull Request activity on GitHub. Includes Push visualizer, peer recognition system, and custom alert builder. The free tier has unlimited users, three repos, and 3 alert configs.每天推送团队在 GitHub 上的提交与 Pull Request 活动报告。含推送可视化、同伴认可系统与自定义告警构建器。免费套餐含不限用户、3 个仓库与 3 组告警配置。

gitter.im↗

Chat, for GitHub. Unlimited public and private rooms, free for teams of up to 25面向 GitHub 的聊天工具。不限公开与私有房间，最多 25 人的团队免费

gokanban.io↗

Syntax-based, no registration Kanban Board for fast use. Free with no limitations.基于语法的免注册看板，便于快速使用。免费且无限制。

Hackmd.io↗

Real time collaboration & writing tool for markdown format docs/files. Like Google Docs but for markdown files. Free unlimited number of “notes”, but the number of collaborators (invitee) for private notes & template will be limited.面向 Markdown 格式文档与文件的实时协作写作工具。像 Google Docs，但针对 Markdown 文件。笔记数量不限，但私有笔记的协作者（被邀请者）数量与模板有限制。

HeySpace↗

Task management tool with chat, calendar, timeline and video calls. Free for up to 5 users.带聊天、日历、时间线与视频通话的任务管理工具。最多 5 名用户免费。

Huly↗

All-in-One Project Management Platform (alternative to Linear, Jira, Slack, Notion, Motion) – unlimited users, 10GB storage per workspace, 10GB video(audio) traffic.一体化项目管理平台（Linear、Jira、Slack、Notion、Motion 的替代品）——不限用户、每工作区 10 GB 存储、10 GB 音视频流量。

Keybase↗

Keybase is a FOSS alternative to Slack; it keeps everyone’s chats and files safe, from families to communities to companies.Keybase 是 Slack 的开源替代品；它让每个人的聊天与文件都安全，无论是家庭、社区还是公司。

Knocket↗

Free-forever contact layer for indie developers and small teams: live chat widget for websites and mobile apps (iOS/Android/Flutter/React Native via WebView), a shareable contact page (Linktree-style with socials, booking links, and blog), and a unified Telegram/email inbox. Reply from Telegram directly (no dashboard needed). Meeting scheduler, multi-language, light/dark themes. Companion open-source AI auto-reply agent. No ads, no seat limits.面向独立开发者与小团队的永久免费联络层：网站与移动应用（iOS、Android、Flutter、React Native 通过 WebView）的在线聊天组件、可分享的联络页（类 Linktree，含社交链接、预约链接与博客）与统一的 Telegram 与邮件收件箱。可直接在 Telegram 中回复（无需仪表盘）。含会议排期、多语言与明暗主题。配套开源 AI 自动回复智能体。无广告，不限坐席。

Linkinize↗

Bookmark manager for teams with tagging, multi-workspaces, and collaboration. Free plan includes 4 workspaces and 10 team members.面向团队的书签管理器，支持标签、多工作区与协作。免费计划含 4 个工作区与 10 名团队成员。

Lockitbot↗

Reserve and lock shared resources within Slack like Rooms, Dev environments , servers etc. Free for upto 2 resources在 Slack 内预留并锁定共享资源，如会议室、开发环境、服务器等。最多 2 个资源免费

meet.jit.si↗

One-click video conversations, and screen sharing, for free一键视频通话与屏幕共享，免费

Miro↗

Scalable, secure, cross-device, and enterprise-ready collaboration whiteboard for distributed teams. With a freemium plan.面向分布式团队的可扩展、安全、跨设备且企业就绪的协作白板。提供免费增值计划。

Notion↗

Notion is a note-taking and collaboration application with markdown support that integrates tasks, wikis, and databases. The company describes the app as an all-in-one workspace for note-taking, project management and task management. In addition to cross-platform apps, it can be accessed via most web browsers.Notion 是支持 Markdown 的笔记与协作应用，整合任务、Wiki 与数据库。官方将其描述为集笔记、项目管理与任务管理于一体的一站式工作区。除跨平台 App 外，也可通过大多数浏览器访问。

Nuclino↗

A lightweight and collaborative wiki for all your team’s knowledge, docs, and notes. Free plan with all essential features, up to 50 items, and 5GB storage.轻量协作式 Wiki，集中沉淀团队知识、文档与笔记。免费计划含全部核心功能，最多 50 个条目与 5 GB 存储。

OnlineInterview.io↗

Free code interview platform with embedded video chat, drawing board, and online code editor where you can compile and run your code on the browser. You can create a remote interview room with just one click.免费代码面试平台，内置视频聊天、画板与在线代码编辑器，可在浏览器中编译并运行代码。一键即可创建远程面试房间。

paste.sh↗

This is a JavaScript and the Crypto based simple paste site.这是一个基于 JavaScript 与加密技术的简易粘贴站点。

Pastefy↗

Beautiful and simple Pastebin with optional Client-Encryption, Multitab-Pastes, an API, a highlighted Editor and more.美观简洁的 Pastebin，可选客户端加密，支持多标签粘贴、API 与高亮编辑器等。

Pendulums↗

Pendulums is a free time tracking tool that helps you manage your time in a better manner with an easy-to-use interface and valuable statistics.Pendulums 是免费时间跟踪工具，通过易用界面与有价值的统计帮助你更好地管理时间。

Proton Pass↗

Password manager with built-in email aliases, 2FA authenticator, sharing and passkeys. Available on web, browser extension, and mobile app and desktop.密码管理器，内置邮箱别名、2FA 验证器、共享与通行密钥。可用于 Web、浏览器扩展、移动 App 与桌面端。

Pullflow↗

Pullflow offers an AI-enhanced platform for code review collaboration across GitHub, Slack, and VS Code.Pullflow 提供 AI 增强的代码评审协作平台，横跨 GitHub、Slack 与 VS Code。

Pumble↗

Free team chat app. Unlimited users and message history, free forever.免费团队聊天应用。不限用户与消息历史，永久免费。

Quidlo Timesheets↗

A simple timesheet and time tracking app for teams. The free plan has time tracking and generating reports features for up to 10 users.面向团队的简易工时表与时间跟踪应用。免费计划含时间跟踪与报表生成功能，最多 10 名用户。

Raindrop.io↗

Private and secure bookmarking app for macOS, Windows, Android, iOS, and Web. Free Unlimited Bookmarks and Collaboration.面向 macOS、Windows、Android、iOS 与 Web 的私密安全书签应用。免费不限书签与协作。

Reezn.io↗

Spec-driven development workflow for teams: shifts review left so problems get caught before code is written, instead of piling up in code review. Builds a knowledge graph of your business as you go, which the AI agents use for later features. Free plan: 3 seats, 1 project, 5 features/month.面向团队的规格驱动开发工作流：把评审左移，让问题在写代码前就被发现，而不是堆积到代码评审。它会随进展构建你业务的知识图谱，供 AI 智能体用于后续功能。免费计划：3 个席位、1 个项目、每月 5 个功能。

Revolt.chat↗

An OpenSource alternative forDiscord, that respects your privacy. It also have most proprietary features from discord for free. Revolt is a all in one application that is secure and fast, while being 100% free. every features are free. They also have (official & unofficial) plugins support unlike most main-stream chatting applications.尊重你隐私的开源 Discord 替代品，同时免费提供 Discord 的大部分专有功能。Revolt 是安全快速的一体化应用且 100% 免费，全部功能免费。与多数主流聊天应用不同，它还支持官方与非官方插件。

Rocket.Chat↗

Open-source communication platform with Omnichannel features, Matrix Federation, Bridge with others apps, Unlimited messaging, and Full messaging history.开源通信平台，具备全渠道特性、Matrix 联邦、与其他应用桥接、不限消息量与完整消息历史。

ruttl.com↗

The best all-in-one feedback tool to collect digital feedback and review websites, PDFs, and images.最好的一体化反馈工具，用于收集数字反馈并评审网站、PDF 与图片。

Screen Sharing via Browser↗

Free screen sharing tool, share your screen with collabrators right from your browser, no download or registration needed. For free.免费屏幕共享工具，直接在浏览器中与协作者共享屏幕，无需下载或注册。完全免费。

seafile.com↗

Private or cloud storage, file sharing, sync, discussions. The cloud version has just 1 GB私有或云存储、文件分享、同步与讨论。云版本仅 1 GB

SiteDots↗

Share feedback for website projects directly on your website, no emulation, canvas or workarounds. Completely functional free tier.直接在网站上为网站项目收集反馈，无需模拟、画布或变通方案。完全可用的免费档位。

Slab↗

A modern knowledge management service for teams. Free for up to 10 users.面向团队的现代知识管理服务。最多 10 名用户免费。

slack.com↗

Free for unlimited users with some feature limitations不限用户免费，但有部分功能限制

StatusPile↗

A status page of status pages. Could you track the status pages of your upstream providers?状态页的状态页。可以跟踪你上游供应商的状态页吗？

Stickies↗

Visual collaboration app used for brainstorming, content curation, and notes. Free for up to 3 Walls, unlimited users, and 1 GB storage.用于头脑风暴、内容整理与笔记的视觉化协作应用。最多 3 个画板免费，用户数不限，1 GB 存储。

MeetBackdrops↗

Free HD virtual backgrounds for video calls on Zoom, Microsoft Teams, and Google Meet. 1,000+ studio-designed environments with no signup required.面向 Zoom、Microsoft Teams 与 Google Meet 视频通话的免费高清虚拟背景。1,000 多个工作室级场景，无需注册。

talky.io↗

Free group video chat. Anonymous. Peer‑to‑peer. No plugins, signup, or payment required免费群组视频聊天。匿名、点对点。无需插件、注册或付费

Teamcamp↗

All-in-one project management application for software development companies.面向软件开发公司的一体化项目管理应用。

Teamhood↗

Free Project, Task, and Issue-tracking software. Supports Kanban with Swimlanes and full Scrum implementation. Has integrated time tracking. Free for five users and three project portfolios.免费的项目、任务与缺陷跟踪软件。支持带泳道的看板与完整 Scrum 实现，并集成时间跟踪。5 名用户与 3 个项目组合免费。

Teamplify↗

improve team development processes with Team Analytics and Smart Daily Standup. Includes full-featured Time Off management for remote-first teams. Free for small groups of up to 5 users.通过团队分析与智能每日站会改善团队研发流程。包含面向远程优先团队的完整休假管理。最多 5 名用户的小团队免费。

TeamSort↗

Free tool to vote on a shared list and rank items together. Create a ranked-choice poll in seconds – no signup.免费工具，可在共享列表上投票并共同排名条目。几秒内创建排序投票，无需注册。

Telegram↗

Telegram is for everyone who wants fast, reliable messaging and calls. Business users and small teams may like the large groups, usernames, desktop apps, and powerful file-sharing options.Telegram 适合所有想要快速、可靠消息与通话的人。企业用户与小团队会喜欢它的超大群组、用户名、桌面应用以及强大的文件分享能力。

Tencent RTC↗

Tencent Real-Time Communication (TRTC) offers solutions for group audio/video calls.10,000 free minutes/month for the first year.腾讯实时音视频（TRTC）提供群组音视频通话方案。首年每月赠送 10,000 分钟。

TimeCamp↗

Free time tracking software for unlimited users. Easily integrates with PM tools like Jira, Trello, Asana, etc.面向不限用户的免费时间跟踪软件。可轻松集成 Jira、Trello、Asana 等项目管理工具。

tldraw.com↗

Free open-source white-boarding and diagramming tool with intelligent arrows, snapping, sticky notes, and SVG export features. Multiplayer mode for collaborative editing. Free official VS Code extension available as well.免费开源的在线白板与绘图工具，具备智能箭头、吸附、便签与 SVG 导出。支持多人协作编辑，还提供免费的官方 VS Code 扩展。

transfernow↗

simplest, fastest and safest interface to transfer and share files. Send photos, videos and other large files without a mandatory subscription.传输与分享文件最简单、最快速且最安全的界面。无需强制订阅即可发送照片、视频与其他大文件。

Tugboat↗

Preview every pull request, automated and on-demand. Free for all, complimentary Nano tier for non-profits.为每个 pull request 生成预览，自动且可按需。对所有人免费，为非营利组织提供补充 Nano 档位。

twist.com↗

An asynchronous-friendly team communication app where conversations stay organized and on-topic. Free and Unlimited plans are available. Discounts are provided for eligible teams.对异步友好的团队沟通应用，对话始终有条理且聚焦主题。提供免费与无限套餐，符合条件的团队可享折扣。

userforge.com↗

Interconnected online personas, user stories and context mapping. Helps keep design and dev in sync free for up to 3 personas and two collaborators.互相关联的在线画像、用户故事与上下文映射。帮助设计与开发保持同步，最多 3 个画像与 2 名协作者免费。

Visual Debug↗

A Visual feedback tool for better client-dev communication改善客户与开发沟通的可视化反馈工具

Webex↗

Video meetings with a free plan offering 40 minutes per meeting with 100 attendees.视频会议，免费方案支持每场会议 40 分钟、100 名参会者。

Webvizio↗

Website feedback tool, website review software, and bug reporting tool for streamlining web development collaboration on tasks directly on live websites and web apps, images, PDFs, and design files.网站反馈工具、网站评审软件与缺陷报告工具，可直接在线上网站与 Web 应用、图片、PDF 及设计文件上协作处理任务，简化 Web 开发协作。

whereby.com↗

One-click video conversations, for free (formerly known as appear.in)一键视频通话，免费（原名为 appear.in）

windmill.dev↗

Windmill is an open-source developer platform to quickly build production-grade multi-step automation and internal apps from minimal Python and Typescript scripts. As a free user, you can create and be a member of at most three non-premium workspaces.Windmill 是一个开源开发者平台，可用极简的 Python 与 Typescript 脚本快速构建生产级多步自动化与内部应用。作为免费用户，你最多可以创建或加入 3 个非付费工作区。

wistia.com↗

Video hosting with viewer analytics, HD video delivery, and marketing tools to help understand your visitors, 25 videos, and Wistia branded player视频托管，含观众分析、高清视频分发与帮助你了解访客的营销工具；25 个视频，以及 Wistia 品牌播放器。

wormhol.org↗

Straightforward file sharing service. Share unlimited files up to 5GB with as many peers as you want.直接了当的文件分享服务。可分享不限量最大 5 GB 的文件，对等方数量随意。

Wormhole↗

Share files up to 5GB with end-to-end encryption for up to 24hours. For files larger than 5 GB, it uses peer-to-peer transfer to send your files directly.以端到端加密分享最大 5 GB 的文件，最长 24 小时。若文件大于 5 GB，则改用点对点传输直接发送。

zoom.us↗

Secure Video and Web conferencing add-ons available. The free plan is limited to 40 minutes.提供安全的视频与网络会议插件。免费计划限 40 分钟。

Zulip↗

Real-time chat with a unique email-like threading model. The free plan includes 10,000 messages of search history and File storage up to 5 GB. also, it provides a self-hostable open-source version.实时聊天，采用独特的类邮件会话串模型。免费计划含 10,000 条消息的搜索历史与最多 5 GB 文件存储。此外还提供可自托管的开源版本。

RightFeature↗

Easily collect feedback from your customers, turn customer feedback into your product roadmap. Collect, prioritize, and ship features that actually matter to your users.轻松收集客户反馈，把客户反馈转化为产品路线图。收集、排优先级并交付真正对用户重要的功能。

Zeitio↗

Time tracking and invoicing for freelancers and small teams. Free plan includes 1 user, 3 active projects and 3 invoices per month.面向自由职业者与小团队的工时跟踪与开票工具。免费方案含 1 名用户、3 个进行中项目，每月 3 张发票。

07CMS内容管理系统12▾

Contentful↗

Headless CMS. Content management and delivery APIs in the cloud. Comes with one free Community space that includes five users, 25K records, 48 Content Types, 2 locales.无头 CMS。云端内容管理与投递 API。含 1 个免费社区空间，包含 5 名用户、25,000 条记录、48 个内容类型与 2 个语言区域。

Cosmic↗

Headless CMS and API toolkit. Free personal plans for developers.无头 CMS 与 API 工具包。为开发者提供免费个人计划。

Crystallize↗

Headless PIM with ecommerce support. Built-in GraphQL API. The free version includes unlimited users, 1000 catalog items, 5 GB/month bandwidth, and 25k/month API calls.支持电商的无头 PIM。内置 GraphQL API。免费版含不限用户、1,000 个目录条目、每月 5 GB 带宽与每月 2.5 万次 API 调用。

DatoCMS↗

Offers free tier for small projects. DatoCMS is a GraphQL-based CMS. On the lower tier, you have 100k/month calls.为小型项目提供免费套餐。DatoCMS 是基于 GraphQL 的 CMS。较低档位每月 10 万次调用。

Hygraph↗

Offers free tier for small projects. GraphQL first API. Move away from legacy solutions to the GraphQL native Headless CMS – and deliver omnichannel content API first.为小型项目提供免费套餐。GraphQL 优先的 API。从传统方案迁移到 GraphQL 原生的无头 CMS，并以内容 API 优先的方式交付全渠道内容。

Prismic↗

Headless CMS. Content management interface with fully hosted and scalable API. The Community Plan provides unlimited API calls, documents, custom types, assets, and locales to one user. Everything that you need for your next project. Bigger free plans are available for Open Content/Open Source projects.无头 CMS。内容管理界面配完全托管且可扩展的 API。社区计划为 1 名用户提供不限 API 调用、文档、自定义类型、素材与语言区域。下一个项目所需的一切都在这里。开放内容或开源项目可申请更大的免费计划。

Sanity.io↗

Platform for structured content with an open-source editing environment and a real-time hosted data store. Unlimited projects. Unlimited admin users, three non-admin users, two datasets, 500K API CDN requests, 10GB bandwidth, and 5GB assets included for free per project.面向结构化内容的平台，含开源编辑环境与实时托管数据存储。项目不限量。每个项目免费包含不限管理员用户、3 名非管理员用户、2 个数据集、50 万次 API CDN 请求、10 GB 带宽与 5 GB 素材。

Solo↗

Free AI website creator from Mozilla, create a beautiful website for your business from a few simple inputs. Free custom domain, no credit card needed.来自 Mozilla 的免费 AI 网站创建器，只需几个简单输入即可为你的业务创建精美网站。免费自定义域名，无需信用卡。

Squidex↗

Offers free tier for small projects. API / GraphQL first. Open source and based on event sourcing (versing every change automatically).为小型项目提供免费套餐。API 与 GraphQL 优先。开源且基于事件溯源（自动对每次变更做版本化）。

Storyblok↗

A Headless CMS for developers and marketers that works with all modern frameworks. The Community (free) tier offers Management API, Visual Editor, ten sources, Custom Field Types, Internationalization (unlimited languages/locales), Asset Manager (up to 2500 assets), Image Optimizing Service, Search Query, Webhook + 250GB Traffic/month included.面向开发者与营销人员的无头 CMS，兼容所有现代框架。社区（免费）版提供 Management API、可视化编辑器、10 个数据源、自定义字段类型、国际化（不限语言与区域）、素材管理（最多 2,500 项素材）、图片优化服务、搜索查询、Webhook，并含每月 250 GB 流量。

TinaCMS↗

Replacing Forestry.io. Open source Git-backed headless CMS that supports Markdown, MDX, and JSON. The basic offer is free with two users available.Forestry.io 的替代品。开源的、由 Git 支撑的无头 CMS，支持 Markdown、MDX 与 JSON。基础版免费，含 2 名用户。

WPJack↗

Set up WordPress on any cloud in less than 5 minutes! The free tier includes 1 server, 2 sites, free SSL certificates, and unlimited cron jobs. No time limits or expirations-your website, your way.不到 5 分钟即可在任意云上搭好 WordPress！免费套餐含 1 台服务器、2 个站点、免费 SSL 证书与不限定时任务。无时间限制也不会过期——你的网站由你作主。

08Code Generation代码生成6▾

Appinvento↗

A free no-code app builder. It provides complete access to the automatically generated backend source code and allows for unlimited APIs and routes. The free plan includes three projects and five tables.免费的无代码应用构建器。可完整访问自动生成的后端源码，API 与路由不限量。免费计划含 3 个项目与 5 张表。

DhiWise↗

Converts Figma designs into dynamic Flutter and React applications. Its code generation technology is designed to optimize workflows for building production-ready mobile and web experiences.把 Figma 设计转换为动态的 Flutter 与 React 应用。其代码生成技术旨在优化构建可上线移动端与 Web 体验的工作流。

Karbon Sites↗

An AI-powered site builder and editor that generates production-ready frontend code from text prompts, sketches, or resumes. Features include native Android (APK) export and a free tier with 5 generations per month (unlimited via custom Gemini API key).AI 驱动的站点构建与编辑器，可由文字提示、草图或简历生成可直接上线的前端代码。特性包括导出原生 Android（APK），免费套餐每月 5 次生成（使用自有 Gemini API 密钥则不限量）。

Metalama↗

A C#-specific tool that generates boilerplate code on the fly during compilation to keep source code clean. It is free for open-source projects; its commercial-friendly free tier includes up to three aspects.一款 C# 专用工具，在编译期间即时生成样板代码以保持源码整洁。对开源项目免费；其商业友好的免费套餐最多可覆盖三个方面。

Supermaven↗

A high-speed AI code completion plugin for VS Code, JetBrains, and Neovim. The free tier provides unlimited inline completions with a focus on ultra-low latency.面向 VS Code、JetBrains 与 Neovim 的高速 AI 代码补全插件。免费套餐提供无限行内补全，主打超低延迟。

v0.dev↗

Created by Vercel, v0 generates copy-and-paste friendly React code using shadcn/ui and Tailwind CSS. It uses a credit system, providing 1,200 starting credits and 200 free credits monthly.由 Vercel 打造，v0 使用 shadcn/ui 与 Tailwind CSS 生成便于复制粘贴的 React 代码。采用额度制，初始赠送 1,200 额度，每月额外 200 免费额度。

09Code Quality代码质量25▾

beanstalkapp.com↗

A complete workflow to write, review, and deploy code), a free account for one user, and one repository with 100 MB of storage用于编写、评审与部署代码的完整工作流，含 1 名用户的免费账号与 1 个 100 MB 存储的仓库

codacy.com↗

Automated code reviews for PHP, Python, Ruby, Java, JavaScript, Scala, CSS, and CoffeeScript, free for unlimited public and private repositories面向 PHP、Python、Ruby、Java、JavaScript、Scala、CSS 与 CoffeeScript 的自动化代码评审，公开与私有仓库均免费不限量

Codeac.io↗

Automated Infrastructure as Code review tool for DevOps integrates with GitHub, Bitbucket, and GitLab (even self-hosted). In addition to standard languages, it also analyzes Ansible, Terraform, CloudFormation, Kubernetes, and more. (open-source free)面向 DevOps 的自动化基础设施即代码评审工具，可集成 GitHub、Bitbucket 与 GitLab（含自托管）。除标准语言外，还可分析 Ansible、Terraform、CloudFormation、Kubernetes 等。（开源免费）

codecov.io↗

Code coverage tool (SaaS), free for Open Source and one free private repo代码覆盖率工具（SaaS），对开源免费，另含 1 个免费私有仓库

CodeFactor↗

Automated Code Review for Git. The free version includes unlimited users, public repositories, and one private repo.面向 Git 的自动化代码评审。免费版含不限用户、公开仓库与 1 个私有仓库。

coderabbit.ai↗

AI-powered code review tool that integrates with GitHub/GitLab. Free tier includes 200 files/hour, 3 reviews per hour, and 50 conversations/hour. Free forever for open source projects.与 GitHub/GitLab 集成的 AI 代码评审工具。免费套餐含每小时 200 个文件、每小时 3 次评审、每小时 50 次对话。开源项目永久免费。

CodSpeed↗

Automate performance tracking in your CI pipelines. Catch performance regressions before deployment, thanks to precise and consistent metrics. Free forever for Open Source projects.在 CI 流水线中自动化性能跟踪。凭借精确一致的指标，在部署前捕捉性能回归。开源项目永久免费。

coveralls.io↗

Display test coverage reports, free for Open Source展示测试覆盖率报告，对开源免费

deepscan.io↗

Advanced static analysis for automatically finding runtime errors in JavaScript code, free for Open Source高级静态分析，可自动发现 JavaScript 代码中的运行时错误，对开源免费

DeepSource↗

DeepSource continuously analyzes source code changes, finding and fixing issues categorized under security, performance, anti-patterns, bug-risks, documentation, and style. Native integration with GitHub, GitLab, and Bitbucket.DeepSource 持续分析源码变更，发现并修复安全、性能、反模式、缺陷风险、文档与风格类问题。原生集成 GitHub、GitLab 与 Bitbucket。

DiffText↗

Instantly find the differences between two blocks of code. Completely free to use.即时找出两段代码之间的差异。完全免费使用。

eversql.com↗

EverSQL – The #1 platform for database optimization. Gain critical insights into your database and SQL queries automatically.EverSQL —— 排名第一的数据库优化平台。自动深入洞察你的数据库与 SQL 查询。

gerrithub.io↗

Gerrit code review for GitHub repositories for free免费为 GitHub 仓库提供 Gerrit 代码评审

goreportcard.com↗

Code Quality for Go projects, free for Open Source面向 Go 项目的代码质量工具，对开源免费

gtmetrix.com↗

Reports and thorough recommendations to optimize websites优化网站的报告与详尽建议

holistic.dev↗

The #1 static code analyzer for Postgresql optimization. Performance, security, and architect database issues automatic detection service面向 PostgreSQL 优化的头号静态代码分析器。自动检测性能、安全与数据库架构问题的服务。

houndci.com↗

Comments on GitHub commits about code quality, free for Open Source在 GitHub 提交上评论代码质量问题，对开源免费

prquorum.com↗

ai code review github app, free 50 reviews/month on 2 reposAI 代码评审 GitHub 应用，2 个仓库每月免费 50 次评审。

reviewable.io↗

Code review for GitHub repositories, free for public or personal repos.面向 GitHub 仓库的代码评审，公开或个人仓库免费。

scan.coverity.com↗

Static code analysis for Java, C/C++, C# and JavaScript, free for Open Source面向 Java、C/C++、C# 与 JavaScript 的静态代码分析，对开源免费

scrutinizer-ci.com↗

Continuous inspection platform, free for Open Source持续检查平台，对开源免费

semanticdiff.com↗

Programming language aware diff for GitHub pull requests and commits, free for public repositories面向 GitHub pull request 与提交的编程语言感知 diff，公开仓库免费

shields.io↗

Quality metadata badges for open source projects面向开源项目的质量元数据徽章

sonarcloud.io↗

Automated source code analysis for Java, JavaScript, C/C++, C#, VB.NET, PHP, Objective-C, Swift, Python, Groovy and even more languages, free for Open Source面向 Java、JavaScript、C/C++、C#、VB.NET、PHP、Objective-C、Swift、Python、Groovy 等更多语言的自动化源码分析，对开源免费

tomosu.ai↗

Scores a repository or pull request with a 0-100 Production Reliability Index, plus fix suggestions and a merge verdict. Free for one repository (public or private) through the VS Code/Cursor plugin, web scan, and GitHub App PR comments.用 0 至 100 的生产可靠性指数为仓库或 pull request 打分，并给出修复建议与合并结论。通过 VS Code 或 Cursor 插件、网页扫描与 GitHub App 的 PR 评论，1 个仓库（公开或私有）免费。

10Code Search and Browsing代码搜索与浏览4▾

CodeKeep↗

Google Keep for Code Snippets. Organize, Discover, and share code snippets, featuring a powerful code screenshot tool with preset templates and a linking feature.代码片段版的 Google Keep。组织、发现并分享代码片段，配有强大的代码截图工具，含预设模板与链接功能。

libraries.io↗

Search and dependency update notifications for 32 different package managers, free for open source面向 32 种不同包管理器的搜索与依赖更新通知，对开源免费

Namae↗

Search various websites like GitHub, Gitlab, Heroku, Netlify, and many more for the availability of your project name.搜索 GitHub、GitLab、Heroku、Netlify 等各类网站，查看你的项目名是否可用。

tickgit.com↗

Surfaces TODO comments (and other markers) to identify areas of code worth returning to for improvement.呈现 TODO 注释（及其他标记），帮助找出值得回头改进的代码区域。

11CI and CD持续集成与交付20▾

appcircle.io↗

An enterprise-grade mobile DevOps platform that automates the build, test, and publish store of mobile apps for faster, efficient release cycle. Free for 30 minutes max build time per build, 20 monthly builds and 1 concurrent build.企业级移动 DevOps 平台，自动化移动应用的构建、测试与商店发布，带来更快更高效的发布周期。免费含单次构建最长 30 分钟、每月 20 次构建与 1 个并发构建。

appveyor.com↗

CD service for Windows, free for Open Source面向 Windows 的 CD 服务，对开源免费

bitrise.io↗

A CI/CD for mobile apps, native or hybrid. With 200 free builds/month 10 min build time and two team members. OSS projects get 45 min build time, +1 concurrency and unlimited team size.面向原生或混合移动应用的 CI/CD。每月 200 次免费构建、单次构建 10 分钟、2 名团队成员。开源项目享 45 分钟构建时长、并发 +1 与不限团队规模。

buddy.works↗

A CI/CD with five free projects and one concurrent run (120 executions/month)含 5 个免费项目与 1 个并发运行的 CI/CD（每月 120 次执行）

Buildkite↗

CI Pipelines free for 3 users and 5k job minutes/month. Test Analytics freeCI 流水线对 3 名用户免费，每月 5,000 分钟任务时长。测试分析免费

bytebase.com↗

Database CI/CD and DevOps. Free under 20 users and ten database instances数据库 CI/CD 与 DevOps。20 名用户与 10 个数据库实例以内免费

CircleCI↗

Comprehensive free plan with all features included in a hosted CI/CD service for GitHub, GitLab, and BitBucket repositories. Multiple resource classes, Docker, Windows, Mac OS, ARM executors, local runners, test splitting, Docker Layer Caching, and other advanced CI/CD features. Free for up to 6000 minutes/month execution time, unlimited collaborators, 30 parallel jobs in private projects, and up to 80,000 free build minutes for Open Source projects.面向 GitHub、GitLab 与 BitBucket 仓库的托管 CI/CD 服务，功能齐全的免费计划包含全部特性：多种资源规格、Docker、Windows、macOS、ARM 执行器、本地 runner、测试拆分、Docker Layer Caching 等高级 CI/CD 能力。每月最多 6,000 分钟执行时长、不限协作者、私有项目 30 个并行任务，开源项目最多 80,000 分钟免费构建时长。

cirun.io↗

Free for public GitHub repositories公开 GitHub 仓库免费

codemagic.io↗

Free 500 build minutes/month每月免费 500 分钟构建时长

deployhq.com↗

1 project with ten daily deployments (30 build minutes/month)1 个项目、每天 10 次部署（每月 30 分钟构建时长）

LocalOps↗

Deploy your app on AWS/GCP/Azure in under 30 minutes. Setup standardised app environments on any cloud, which come with in-built continuous deployment automation and advanced observability. The free plan allows 1 user and 1 app environment.30 分钟内把应用部署到 AWS/GCP/Azure。可在任意云上搭建标准化的应用环境，内置持续部署自动化与高级可观测能力。免费计划允许 1 名用户与 1 个应用环境。

Make↗

The workflow automation tool lets you connect apps and automate workflows using UI. It supports many apps and the most popular APIs. Free for public GitHub repositories, and free tier with 100 Mb, 1000 Operations, and 15 minutes of minimum interval.该工作流自动化工具可让你通过界面连接应用并自动化工作流，支持众多应用与最流行的 API。对公开 GitHub 仓库免费；免费档含 100 Mb、1000 次操作，最小间隔 15 分钟。

Mergify↗

workflow automation and merge queue for GitHub – Free for public GitHub repositories面向 GitHub 的工作流自动化与合并队列 —— 对公开 GitHub 仓库免费。

Nx Cloud↗

Nx Cloud speeds up your monorepos on CI with features such as remote caching, distribution of tasks across machines and even automated splitting of your e2e test runs. It comes with a free plan for up to 30 contributors with generous 150k credits included.Nx Cloud 通过远程缓存、跨机器任务分发甚至自动化拆分端到端测试等能力，加速 CI 上的 monorepo。提供面向最多 30 名贡献者的免费计划，含 15 万额度。

RunMyJob↗

Run GitHub Actions and GitLab CI pipelines smarter with real-time scaling Spike Instances. Free tier includes 400 vCPU-minutes, 800 GB-minutes, and 10 concurrent jobs with high-performance runners (12 vCPU and 32 GB RAM per job).通过实时扩容的 Spike 实例更智能地运行 GitHub Actions 与 GitLab CI 流水线。免费套餐含 400 vCPU 分钟、800 GB 分钟与 10 个并发任务，且使用高性能 runner（每个任务 12 vCPU 与 32 GB 内存）。

Shipfox↗

Run your GitHub actions 2x faster, 3.000 build minutes free each month.让你的 GitHub Actions 快 2 倍，每月免费 3,000 分钟构建时长。

Spacelift↗

Management platform for Infrastructure as Code. Free plan features: IaC collaboration, Terraform module registry, ChatOps integration, Continuous resource compliance with Open Policy Agent, SSO with SAML 2.0, and access to public worker pools: up to 200 minutes/month基础设施即代码管理平台。免费计划特性：IaC 协作、Terraform 模块注册表、ChatOps 集成、基于 Open Policy Agent 的持续资源合规、SAML 2.0 SSO，并可访问公共 worker 池：每月最多 200 分钟

Terramate↗

Terramate is an orchestration and management platform for Infrastructure as Code (IaC) tools such as Terraform, OpenTofu, and Terragrunt. Free up to 2 users including all features.Terramate 是面向 Terraform、OpenTofu、Terragrunt 等基础设施即代码（IaC）工具的编排与管理平台。最多 2 名用户免费，包含全部功能。

Terrateam↗

GitOps-first Terraform automation with pull request-driven workflows, project isolation via self-hosted runners, and layered runs for ordered operations. Free for up to 3 users.GitOps 优先的 Terraform 自动化，支持以 PR 驱动的工作流、通过自托管 runner 实现项目隔离，以及用于有序操作的分层运行。最多 3 名用户免费。

Trigger.dev↗

Open-source background jobs and AI agent platform with durable tasks, no timeouts, and realtime. Free plan includes $5 monthly compute credits, 20 concurrent runs, unlimited tasks, 5 team members, 10 schedules, and 1-day log retention.开源后台任务与 AI 智能体平台，具备持久化任务、无超时与实时能力。免费计划含每月 5 美元计算额度、20 个并发运行、不限任务、5 名团队成员、10 个定时计划与 1 天日志保留。

12Testing测试35▾

Appetize↗

Test your Android & iOS apps on this Cloud Based Android Phone / Tablets emulator and iPhone/iPad simulators directly in your browser. The free tier includes two concurrent session with 30 minutes of usage per month. No limit on app size.直接在浏览器中使用云端安卓手机 / 平板模拟器与 iPhone/iPad 模拟器测试你的 Android 与 iOS 应用。免费档包含 2 个并发会话，每月 30 分钟使用时长。应用体积不限。

Argos↗

Open Source visual testing for developers. Unlimitedprojects, with 5,000 screenshots per month. Free for open-source projects.面向开发者的开源视觉测试。项目不限量，每月 5,000 张截图。开源项目免费。

Bencher↗

A continuous benchmarking tool suite to catch CI performance regressions. Free for all public projects.用于捕捉 CI 性能回归的持续基准测试工具套件。对所有公开项目免费。

BugBug↗

Lightweight test automation tool for web applications. It is easy to learn and doesn’t require coding. You can run unlimited tests on your own computer for free. You also get cloud monitoring and CI/CD integration for an additional monthly fee.面向 Web 应用的轻量测试自动化工具。易学且无需编码。可在自己的电脑上免费运行不限次数的测试。另可按月付费获得云端监控与 CI/CD 集成。

checkbot.io↗

Browser extension that tests if your website follows 50+ SEO, speed and security best practices. Free tier for smaller websites.浏览器扩展，检测你的网站是否符合 50 多项 SEO、速度与安全最佳实践。为小型网站提供免费套餐。

Checkly↗

Code-first synthetic monitoring for modern DevOps. Monitor your APIs and apps at a fraction of the price of legacy providers. Powered by a Monitoring as Code workflow and Playwright. Generous free tier for devs.面向现代 DevOps 的代码优先合成监控。以远低于传统厂商的价格监控你的 API 与应用。由 Monitoring as Code 工作流与 Playwright 驱动。为开发者提供慷慨的免费套餐。

CORS-Tester↗

A free tool for developers and API testers to check if an API is CORS-enabled for a given domain and identify gaps. Get actionable insights.面向开发者与 API 测试者的免费工具，可检测某 API 对指定域名是否启用 CORS 并找出缺口，给出可执行的改进建议。

cypress.io↗

Fast, easy and reliable testing for anything that runs in a browser. Cypress Test Runner is always free and open-source with no restrictions and limitations. Cypress Dashboard is free for open-source projects for up to 5 users.为任何在浏览器中运行的东西提供快速、简单且可靠的测试。Cypress Test Runner 始终免费且开源，无任何限制。Cypress Dashboard 对开源项目最多 5 名用户免费。

everystep-automation.com↗

Records and replays all steps made in a web browser and creates scripts, free with fewer options记录并回放浏览器中的所有操作并生成脚本，免费但可选功能较少

gridlastic.com↗

Selenium Grid testing with a free plan of up to 4 simultaneous selenium nodes/10 grid starts/4,000 test minutes/monthSelenium Grid 测试，免费计划最多 4 个并行 selenium 节点、10 次 grid 启动与每月 4,000 分钟测试时长

katalon.com↗

Provides a testing platform that can help teams of all sizes at different levels of testing maturity, including Katalon Studio, TestOps (+ Visual Testing free), TestCloud, and Katalon Recorder.提供测试平台，可服务各种规模、处于不同测试成熟度的团队，包括 Katalon Studio、TestOps（含免费视觉测试）、TestCloud 与 Katalon Recorder。

Keploy↗

Keploy is a functional testing toolkit for developers. Recording API calls generates E2E tests for APIs (KTests) and mocks or stubs(KMocks). It is free for Open Source projects.Keploy 是面向开发者的功能测试工具包。录制 API 调用即可为 API 生成端到端测试（KTests）与 mock 或 stub（KMocks）。对开源项目免费。

Lastest↗

Ship fast. Don’t break things. AI-supported visual verification and tests you can actually trust. Free forever plan: 1 project, 500 runner-minutes/mo, 1 concurrent run, no credit card.快速交付，不出事故。AI 支持的视觉验证与真正可信的测试。永久免费计划：1 个项目、每月 500 runner 分钟、1 个并发运行，无需信用卡。

loadmill.com↗

Automatically create API and load tests by analyzing network traffic. Simulate up to 50 concurrent users for up to 60 minutes for free monthly.通过分析网络流量自动创建 API 与负载测试。每月可免费模拟最多 50 个并发用户、最长 60 分钟。

lost-pixel.com↗

holistic visual regression testing for your Storybook, Ladle, Histoire stories and Web Apps. Unlimited team members, totally free for open-source, 7,000 snapshots/month.面向 Storybook、Ladle、Histoire 故事与 Web 应用的全方位视觉回归测试。团队成员不限，开源项目完全免费，每月 7,000 张快照。

OpenWebhook↗

Temporary webhook URL and live inspector. No signup. Event history stays in the browser. Custom slugs and remote forwarding are paid.临时 Webhook 地址与实时检查器。无需注册。事件历史保存在浏览器中。自定义 slug 与远程转发为付费功能。

pagegym.com↗

Load behaviour and page speed analysis and optimization tool. The free plan provides 10 tests per day, 5 experiments per week, and 15 GB of maximum ingested data per month.负载行为与页面速度的分析与优化工具。免费计划每天 10 次测试、每周 5 个实验与每月最多 15 GB 数据写入量。

percy.io↗

Add visual testing to any web app, static site, style guide, or component library. Unlimited team members, Demo app, and unlimited projects, 5,000 snapshots/month.为任意 Web 应用、静态站点、样式指南或组件库加入视觉测试。不限团队成员、含演示应用与不限项目、每月 5,000 张快照。

qase.io↗

Test management system for Dev and QA teams. Manage test cases, compose test runs, perform tests, track defects, and measure impact. The free tier includes all core features, with 500MB available for attachments and up to 3 users.面向研发与 QA 团队的测试管理系统。管理测试用例、编排测试运行、执行测试、跟踪缺陷并评估影响。免费档包含全部核心功能，附件空间 500MB，最多 3 名用户。

Repeato↗

No-code mobile app test automation tool built on top of computer vision and AI.构建在计算机视觉与 AI 之上的无代码移动应用测试自动化工具。

Requestly↗

Open-source Chrome Extension to Intercept, Redirect and Mock HTTP Requests.开源 Chrome 扩展，可拦截、重定向并 Mock HTTP 请求。

Sample Files↗

Collection of free test files across video, audio, document and archive formats, useful for testing and QA.覆盖视频、音频、文档与压缩包格式的免费测试文件合集，适合测试与 QA。

seotest.me↗

Free on-page SEO website tester. 10 free website crawls per day. Useful SEO learning resources and recommendations on how to improve the on-page SEO results for any website regardless of technology.免费的页面内 SEO 网站检测工具。每天免费抓取 10 个网站。提供实用的 SEO 学习资料，并就如何提升任意网站的页面内 SEO 结果给出建议（不限技术栈）。

Sherlo↗

Visual regression testing for React Native apps. Free plan: 1,000 snapshots/month, iOS & Android simulators.面向 React Native 应用的视觉回归测试。免费方案：每月 1,000 张快照，iOS 与 Android 模拟器。

snippets.uilicious.com↗

It’s like CodePen but for cross-browser testing. UI-licious lets you write tests like user stories and offers a free platform – UI-licious Snippets – that allows you to run unlimited tests on Chrome with no sign-up required for up to 3 minutes per test run. Found a bug? You can copy the unique URL to your test to show your devs exactly how to reproduce the bug.类似 CodePen，但用于跨浏览器测试。UI-licious 让你像写用户故事一样写测试，并提供免费平台 UI-licious Snippets，可在 Chrome 上运行不限次数的测试，无需注册，单次运行最长 3 分钟。发现缺陷时，可复制测试的唯一 URL 发给开发，精确复现问题。

SSR (Server-side Rendering) Checker↗

Check SSR (server-side rendering) for any URL by visually comparing the server rendered version of the page with the regular version.通过可视化对比服务器渲染版本与常规版本，检查任意 URL 的 SSR（服务端渲染）情况。

testingbot.com↗

Selenium Browser and Device Testing, free for Open SourceSelenium 浏览器与设备测试，对开源免费

Testspace.com↗

A Dashboard for publishing automated test results and a Framework for implementing manual tests as code using GitHub. The service is free for Open Source and accounts for 450 monthly results.用于发布自动化测试结果的看板，以及用 GitHub 以代码方式实现手工测试的框架。该服务对开源免费，账号每月 450 条结果。

tesults.com↗

Test results reporting and test case management. Integrates with popular test frameworks. Open Source software developers, individuals, educators, and small teams getting started can request discounted and free offerings beyond basic free projects.测试结果报告与测试用例管理，可与主流测试框架集成。开源软件开发者、个人、教育工作者以及刚起步的小团队，可在基础免费项目之外申请折扣与免费权益。

UseWebhook.com↗

Capture and inspect webhooks from your browser. Forward to localhost, or replay from history. Free to use.在浏览器中捕获并检查 Webhook。可转发到 localhost，或从历史记录重放。免费使用。

Vaadin↗

Build scalable UIs in Java or TypeScript, and use the integrated tooling, components, and design system to iterate faster, design better, and simplify the development process. Unlimited Projects with five years of free maintenance.用 Java 或 TypeScript 构建可扩展 UI，借助集成工具链、组件与设计系统更快迭代、更好地设计并简化开发流程。项目不限量，含五年免费维护。

VibeView↗

Browser-based iOS, Android, Apple TV and Android TV simulators with AI-powered test automation from a recorded flow or plain-language instructions. Free tier includes two concurrent sessions and 30 minutes of streaming per month. Bringing your own API key bypasses the included AI usage credit.基于浏览器的 iOS、Android、Apple TV 与 Android TV 模拟器，支持由录制流程或自然语言指令驱动的 AI 测试自动化。免费套餐含 2 个并发会话与每月 30 分钟串流时长。自带 API 密钥可绕过内置的 AI 用量额度。

webhook.site↗

Verify webhooks, outbound HTTP requests, or emails with a custom URL. A temporary URL and email address are always free.用自定义 URL 校验 Webhook、出站 HTTP 请求或邮件。临时 URL 与邮箱地址始终免费。

websitepulse.com↗

Various free network and server tools.各种免费的网络与服务器工具。

kogiQA↗

A web UI automation tool that functions without the need for selectors. Every developer gets 500 actions per month for free.无需选择器的 Web UI 自动化工具。每位开发者每月免费 500 次操作。

13Security and PKI安全与公钥基础设施38▾

aikido.dev↗

All-in-one appsec platform covering SCA, SAST, CSPM, DAST, Secrets, IaC, Malware, Container scanning, EOL,… Free plan includes two users, scanning of 10 repos, 1 cloud, 2 containers & 1 domain.一体化应用安全平台，覆盖 SCA、SAST、CSPM、DAST、密钥、IaC、恶意软件、容器扫描、EOL 等。免费计划含 2 名用户，可扫描 10 个仓库、1 个云、2 个容器与 1 个域名。

CertKit↗

Manage SSL Certificate issuance, renewal, and monitoring. Search the Certificate Transparency Logs. Free for 3 certificates and 1 user after the beta.管理 SSL 证书的签发、续期与监控。可搜索证书透明度日志。测试期后 3 张证书与 1 名用户免费。

CertObserver CT Search↗

Find public SSL/TLS certificates recorded in Certificate Transparency logs. CT search is free but CT monitoring is not.查询证书透明度日志中记录的公开 SSL/TLS 证书。CT 搜索免费，但 CT 监控不免费。

CertPost↗

Live SSL/TLS certificate monitoring on port 443 or custom ports (SMTP/IMAP). Reads the served certificate on the wire, full chain verification, and alerts via email or webhook before expiration. Free tier includes 3 certificates monitored forever.在 443 端口或自定义端口（SMTP、IMAP）上实时监控 SSL/TLS 证书。读取链路上实际下发的证书、完整校验证书链，并在到期前通过邮件或 Webhook 告警。免费套餐永久监控 3 张证书。

Corgea↗

Free autonomous security platform that finds, validates and fixes insecure code and packages across +20 languages and frameworks. Free plan includes 1 user and 2 repos.免费的自主安全平台，可在 20 多种语言与框架中发现、验证并修复不安全的代码与依赖包。免费计划含 1 名用户与 2 个仓库。

crypteron.com↗

Cloud-first, developer-friendly security platform prevents data breaches in .NET and Java applications云优先、对开发者友好的安全平台，防止 .NET 与 Java 应用发生数据泄露

CyberChef↗

A simple, intuitive web app for analyzing and decoding/encoding data without dealing with complex tools or programming languages. Like a Swiss army knife of cryptography & encryption. All features are free to use, with no limit. Open source if you wish to self-host.简单直观的 Web 应用，无需复杂工具或编程语言即可分析与编解码数据，堪称密码学与加密的瑞士军刀。所有功能免费不限量，开源可自托管。

Datree↗

Open Source CLI tool to prevent Kubernetes misconfigurations by ensuring that manifests and Helm charts follow best practices as well as your organization’s policies开源 CLI 工具，通过确保 manifest 与 Helm chart 遵循最佳实践及你组织的策略，防止 Kubernetes 配置错误

Dependabot↗

Automated dependency updates for Ruby, JavaScript, Python, PHP, Elixir,面向 Ruby、JavaScript、Python、PHP、Elixir 的自动化依赖更新

DJ Checkup↗

Scan your Django site for security flaws with this free, automated checkup tool. Forked from the Pony Checkup site.用这个免费的自动化体检工具扫描你的 Django 站点安全缺陷。源自 Pony Checkup 站点分支。

Doppler↗

Universal Secrets Manager for application secrets and config, with support for syncing to various cloud providers. Free for five users with basic access controls.面向应用密钥与配置的通用密钥管理器，支持同步到多家云厂商。5 名用户以内免费，含基础访问控制。

Dotenv↗

Sync your .env files, quickly & securely. Stop sharing your .env files over insecure channels like Slack and email, and never lose an important .env file again. Free for up to 3 teammates.快速安全地同步你的 .env 文件。不再通过 Slack 与邮件等不安全渠道共享 .env 文件，也不再丢失重要的 .env 文件。最多 3 名队友免费。

GitGuardian↗

Keep secrets out of your source code with automated secrets detection and remediation. Scan your git repos for 350+ types of secrets and sensitive files – Free for individuals and teams of 25 developers or less.通过自动化的密钥检测与修复，把密钥挡在源码之外。扫描你的 git 仓库，识别 350 多种密钥与敏感文件——个人与 25 名开发者以内的团队免费。

HasMySecretLeaked↗

Search across 20 million exposed secrets in public GitHub repositories, gists, issues,and comments for Free免费搜索公开 GitHub 仓库、gist、issue 与评论中暴露的 2,000 万个密钥

Have I been pwned?↗

REST API for fetching the information on the breaches.用于获取数据泄露信息的 REST API。

HimitsuShell↗

A shell script DRM compiler that converts shell scripts into obfuscated binaries using an embedded shell interpreter and anti-debugging (alternative to shc). Free unlimited web edition.Shell 脚本 DRM 编译器，利用内嵌 Shell 解释器与反调试技术把 Shell 脚本转成混淆二进制（shc 的替代品）。网页版免费不限量。

hostedscan.com↗

Online vulnerability scanner for web applications, servers, and networks. Ten free scans per month.面向 Web 应用、服务器与网络的在线漏洞扫描器。每月 10 次免费扫描。

Infisical↗

Open source platform that lets you manage developer secrets across your team and infrastructure: everywhere from local development to staging/production 3rd-party services. Free for up to 5 developers.开源平台，可跨团队与基础设施管理开发者密钥：从本地开发到预发与生产环境的第三方服务。最多 5 名开发者免费。

inspect.software↗

Public record of automated open-source repository audits: security posture, maintainability, dependency health, and malicious-package checks, with a versioned methodology and grade badges. Free tier: full access to all published reports, automatic coverage of repositories above the public-interest threshold (≥500 stars, ≥50 forks, or org-owned with ≥250 stars), embeddable badges, and 100 starting credits (5 inspections) for below-threshold repositories.自动化开源仓库审计的公开记录：安全态势、可维护性、依赖健康与恶意包检查，附带版本化方法论与评级徽章。免费套餐：可完整访问所有已发布报告，对超过公共利益阈值的仓库自动覆盖（500 star 以上、50 fork 以上，或组织所有且 250 star 以上），可嵌入徽章，且低于阈值的仓库可获 100 初始额度（5 次检查）。

Internet.nl↗

Test for modern Internet Standards like IPv6, DNSSEC, HTTPS, DMARC, STARTTLS and DANE检测 IPv6、DNSSEC、HTTPS、DMARC、STARTTLS 与 DANE 等现代互联网标准。

IntoDNS.ai↗

DNS and email security analyzer that checks SPF, DKIM, DMARC, DNSSEC, BIMI, MTA-STS, and 40+ blacklists with AI-powered explanations and fix suggestions. 100% free, no signup required.DNS 与邮件安全分析器，检查 SPF、DKIM、DMARC、DNSSEC、BIMI、MTA-STS 与 40 多个黑名单，并提供 AI 驱动的解释与修复建议。100% 免费，无需注册。

letsencrypt.org↗

Free SSL Certificate Authority with certs trusted by all major browsers免费的 SSL 证书颁发机构，其证书被所有主流浏览器信任

meterian.io↗

Monitor Java, Javascript, .NET, Scala, Ruby, and NodeJS projects for security vulnerabilities in dependencies. Free for one private project, unlimited projects for open source.监控 Java、JavaScript、.NET、Scala、Ruby 与 NodeJS 项目依赖中的安全漏洞。1 个私有项目免费，开源项目不限量。

Mozilla Observatory↗

Find and fix security vulnerabilities in your site.发现并修复你网站上的安全漏洞。

Otterwatch↗

Daily SSL/TLS certificate monitoring: expiry alerts (30/7/1 day), chain and OCSP revocation checks, and certificate transparency issuance history. Free forever for 5 domains, no credit card.每日 SSL/TLS 证书监控：到期告警（提前 30/7/1 天）、证书链与 OCSP 吊销检查，以及证书透明度签发历史。5 个域名永久免费，无需信用卡。

Protectumus↗

Free website security check, site antivirus, and server firewall (WAF) for PHP. Email notifications for registered users in the free tier.面向 PHP 的免费网站安全检查、站点杀毒与服务器防火墙（WAF）。免费套餐中注册用户可获邮件通知。

Public Cloud Threat Intelligence↗

High confidence Indicator of Compromise(IOC) targeting public cloud infrastructure, A portion is available on github (https://github.com/unknownhad/AWSAttacks). Full list is available via API面向公有云基础设施的高可信度入侵指标（IOC）。部分内容见 GitHub（https://github.com/unknownhad/AWSAttacks），完整清单可通过 API 获取

pyup.io↗

Monitor Python dependencies for security vulnerabilities and update them automatically. Free for one private project, unlimited projects for open source.监控 Python 依赖中的安全漏洞并自动更新。1 个私有项目免费，开源项目不限量。

qualys.com↗

Find web app vulnerabilities, audit for OWASP Risks发现 Web 应用漏洞，按 OWASP 风险进行审计

SikkerKey↗

Machine authenticated secrets manager, includes 2 projects, 2 bootstrapped machines, 20 secrets and 7 days audit log retention for free.面向机器认证的密钥管理器，免费含 2 个项目、2 台已引导机器、20 个密钥与 7 天审计日志保留。

Smart Grow Vault↗

Secure Enterprise-grade platform for managing environment variables and secrets. Free tier includes up to 3 applications and 150 secrets per project.面向企业的安全管理平台，用于管理环境变量与密钥。免费套餐含最多 3 个应用与每项目 150 个密钥。

Socket↗

Free supply chain security for individual developers, small teams, and open source projects. Includes a free app and firewall CLI tool to protect your code from vulnerable and malicious dependencies. Detects 70+ indicators of supply chain risk.面向个人开发者、小型团队与开源项目的免费供应链安全方案。含免费应用与防火墙 CLI 工具，保护你的代码免受有漏洞与恶意依赖的影响。可检测 70 多项供应链风险指标。

ssllabs.com↗

Intense analysis of the configuration of any SSL web server深度分析任意 SSL Web 服务器的配置

Sucuri SiteCheck↗

Free website security check and malware scanner免费的网站安全检查与恶意软件扫描

TestTLS.com↗

Test an SSL/TLS service for secure server configuration, certificates, chains, etc. Not limited to HTTPS.测试 SSL/TLS 服务的服务器安全配置、证书、证书链等。不限于 HTTPS。

Virgil Security↗

Tools and services for implementing end-to-end encryption, database protection, IoT security, and more in your digital solution. Free for applications with up to 250 users.用于在数字方案中实现端到端加密、数据库保护、物联网安全等能力的工具与服务。应用用户数不超过 250 时免费。

semgrep↗

Scan code for security issues and vulnerable dependencies with SAST and SCA. Free tier includes up to 10 contributors and 10 private repos (unlimited public repos).通过 SAST 与 SCA 扫描代码中的安全问题与有漏洞的依赖。免费套餐含最多 10 名贡献者与 10 个私有仓库（公开仓库不限量）。

SnapEnv↗

Secure environment variable manager for dev teams. AES-256-GCM encryption at rest, CLI, Kubernetes operator, and audit log. Free plan includes 3 projects, 3 members, and 3 environments per project, forever.面向开发团队的安全环境变量管理器。静态加密使用 AES-256-GCM，提供 CLI、Kubernetes operator 与审计日志。免费计划含 3 个项目、3 名成员与每项目 3 个环境，永久有效。

14Authentication, Authorization, and User Management认证、授权与用户管理28▾

360username↗

A free tool to search a username across 90+ social platforms to find matching profiles.免费工具，可在 90 多个社交平台上搜索用户名以找到对应资料。

Aserto↗

Fine-grained authorization as a service for applications and APIs. Free up to 1000 MAUs and 100 authorizer instances.面向应用与 API 的细粒度授权即服务。最多 1,000 MAU 与 100 个授权实例免费。

asgardeo.io↗

Seamless Integration of SSO, MFA, passwordless auth and more. Includes SDKs for frontend and backend apps. Free up to 1000 MAUs and five identity providers.无缝集成 SSO、MFA、免密认证等。含前端与后端应用的 SDK。最多 1,000 MAU 与 5 个身份提供商免费。

Auth0↗

Hosted SSO. The free plan includes 25,000 MAUs, unlimited Social Connections, a custom domain, and more.托管式 SSO。免费计划含 25,000 MAU、不限社交连接、自定义域名等。

Authgear↗

Bring Passwordless, OTPs, 2FA, SSO to your apps in minutes. All Front-end included. Free up to 5000 MAUs.几分钟内为你的应用接入免密、OTP、2FA 与 SSO。含全部前端。最多 5,000 名 MAU 免费。

Authress↗

Authentication login and access control, unlimited identity providers for any project. Facebook, Google, Twitter and more. The first 1000 API calls are free.认证登录与访问控制，任意项目可使用不限身份提供商，支持 Facebook、Google、Twitter 等。前 1,000 次 API 调用免费。

Authy↗

Two-factor authentication (2FA) on multiple devices, with backups. Drop-in replacement for Google Authenticator. Free for up to 100 successful authentications.支持多设备与备份的双因素认证（2FA）。可直接替代 Google Authenticator。最多 100 次成功认证免费。

Cerbos Hub↗

A complete authorization management system for authoring, testing, and deploying access policies. Fine-grained authorization and access control, free up to 100 monthly active principals.用于编写、测试与部署访问策略的完整授权管理系统。细粒度授权与访问控制，免费支持每月最多 100 个活跃主体。

Clerk↗

User management, authentication, 2FA/MFA, prebuilt UI components for sign-in, sign-up, user profiles, and more. Free plan includes unlimited applications, 50,000 MRU limit per app, 3 dashboard seats, and more.用户管理、身份认证、2FA/MFA，以及登录、注册、用户资料等预制 UI 组件。免费方案包含应用数量不限、每应用 50,000 MRU 上限、3 个控制台席位等。

Cloud-IAM↗

Keycloak Identity and Access Management as a Service. Free up to 100 users and one realm.Keycloak 身份与访问管理即服务。最多 100 名用户与 1 个 realm 免费。

Descope↗

Highly customizable AuthN flows, has both a no-code and API/SDK approach, Free 7,500 active users/month, 50 tenants (up to 5 SAML/SSO tenants).高度可定制的认证流程，同时提供无代码与 API 及 SDK 两种方式。每月免费 7,500 名活跃用户、50 个租户（最多 5 个 SAML 与 SSO 租户）。

duo.com↗

Two-factor authentication (2FA) for website or app. Free for ten users, all authentication methods, unlimited, integrations, hardware tokens.面向网站或应用的双因素认证（2FA）。10 名用户以内免费，支持所有认证方式、不限集成，并提供硬件令牌。

Kinde↗

Simple, robust authentication you can integrate with your product in minutes. Everything you need to get started with 7,500 free MAU.简单稳健的认证，几分钟内即可集成进你的产品。上手所需的一切，含 7,500 免费 MAU。

logintc.com↗

Two-factor authentication (2FA) by push notifications, free for ten users, VPN, Websites, and SSH通过推送通知实现的双因素认证（2FA），10 名用户以内免费，支持 VPN、网站与 SSH。

Logto↗

Develop, secure, and manage user identities of your product – for both authentication and authorization. Free for up to 5,000 MAUs with open-source self-hosted option available.为你的产品开发、保护并管理用户身份 —— 兼顾认证与授权。最多 5,000 MAU 免费，并提供开源自托管选项。

MojoAuth↗

MojoAuth makes it easy to implement Passwordless authentication on your web, mobile, or any application in minutes.MojoAuth 让你几分钟内在 Web、移动端或任意应用上实现免密认证。

Okta↗

User management, authentication and authorization. Free for up to 100 monthly active users.用户管理、身份认证与授权。月活跃用户不超过 100 时免费。

Ory↗

AuthN/AuthZ/OAuth2.0/Zero Trust managed security platform. Forever free developer accounts with all security features, unlimited team members, 200 daily active users, and 25k/mo permission checks.认证、授权、OAuth2.0 与零信任托管安全平台。永久免费开发者账号，含全部安全功能、不限团队成员、200 名日活用户与每月 2.5 万次权限校验。

Permit.io↗

Auhtorization-as-a-service provider platform enabling RBAC, ABAC, and ReBAC for scalable microservices with real-time updates and a no-code policy UI. A 1000 Monthly Active User free tier.授权即服务平台，为可扩展的微服务提供 RBAC、ABAC 与 ReBAC，支持实时更新与无代码策略界面。免费套餐含 1,000 名月活用户。

Phase Two↗

Keycloak Open Source Identity and Access Management. Free realm up to 1000 users, up to 10 SSO connections, leveraging Phase Two’s Keycloak enhanced container which includes the Organization extension.Keycloak 开源身份与访问管理。免费 realm 最多 1,000 名用户与 10 个 SSO 连接，基于 Phase Two 的 Keycloak 增强容器，其中包含 Organization 扩展。

PropelAuth↗

A Sell to companies of any size immediately with a few lines of code, free up to 200 users and 10k Transactional Emails (with a watermark branding: “Powered by PropelAuth”).用几行代码即可立即向任意规模的公司销售，免费支持最多 200 名用户与 1 万封事务邮件（带 Powered by PropelAuth 水印品牌）。

Scalekit↗

Enterprise SSO (SAML, OIDC), SCIM provisioning, and social logins for B2B SaaS. Free tier includes 1 million MAU, 100 organizations, 1 SSO connection, and 1 SCIM connection.面向 B2B SaaS 的企业级 SSO（SAML、OIDC）、SCIM 同步与社会化登录。免费套餐含 100 万 MAU、100 个组织、1 个 SSO 连接与 1 个 SCIM 连接。

Stack Auth↗

Open-source authentication that doesn’t suck. The most developer-friendly solution, getting you started in just five minutes. Self-hostable for free, or offers a managed SaaS version with 10k free Monthly Active Users.不将就的开源认证。最开发者友好的方案，五分钟即可上手。可免费自托管，或使用托管 SaaS 版并获 1 万免费月活用户。

Stytch↗

An all-in-one platform that provides APIs and SDKs for authentication and fraud prevention. The free plan includes 10,000 monthly active users, unlimited organizations, 5 SSO or SCIM connections, and 1,000 M2M tokens.一体化平台，为认证与防欺诈提供 API 与 SDK。免费计划含每月 10,000 名活跃用户、不限组织数、5 个 SSO 或 SCIM 连接与 1,000 个 M2M token。

SuperTokens↗

Open source user authentication that natively integrates into your app – enabling you to get started quickly while controlling the user and developer experience. Free for up to 5000 MAUs.开源用户认证，可原生集成进你的应用——让你快速开始，同时掌控用户与开发者体验。最多 5,000 MAU 免费。

Unkey↗

Open-source API key management and rate-limiting platform. Free for up to 100,000 requests per month and 100 active API keys, with full access to key creation, revocation, and rate-limiting capabilities.开源 API 密钥管理与限流平台。每月最多 100,000 次请求与 100 个活跃 API 密钥免费，并完整开放密钥创建、吊销与限流能力。

WorkOS↗

Free user management and authentication for up to 1 Million MAUs. Support email + password, social auth, Magic Auth, MFA, and more.最多 100 万 MAU 的免费用户管理与认证。支持邮箱加密码、社会化登录、Magic Auth、MFA 等。

ZITADEL Cloud↗

A turnkey user and access management that works for you and supports multi-tenant (B2B) use cases. Free for up to 25,000 authenticated requests, with all security features (no paywall for OTP, Passwordless, Policies, and so on).开箱即用的用户与访问管理，支持多租户（B2B）场景。免费支持最多 25,000 次认证请求，且包含全部安全功能（OTP、免密、策略等均无付费墙）。

15Mobile App Distribution and Feedback移动应用分发与用户反馈6▾

Appho.st↗

Mobile app hosting platform. The free plan includes five apps, 50 monthly downloads, and a maximum file size of 100 MB.移动应用托管平台。免费计划含 5 个应用、每月 50 次下载与最大 100 MB 的单文件。

Diawi↗

Deploy iOS & Android apps directly to devices. Free plan: app uploads, password-protected links, 1-day expiration, ten installations.把 iOS 与 Android 应用直接分发到设备。免费计划：应用上传、密码保护链接、1 天有效期、10 次安装。

GetUpdraft↗

Distribute mobile apps for testing. The free plan includes one app project, three app versions, 500 MB storage, and 100 app installations per month.为测试分发移动应用。免费计划含 1 个应用项目、3 个应用版本、500 MB 存储与每月 100 次应用安装。

InstallOnAir↗

Distribute iOS & Android apps over the air. Free plan: unlimited uploads, private links, 2-day expiration for guests, 60 days for registered users.通过空中分发 iOS 与 Android 应用。免费计划：不限上传、私有链接、访客 2 天有效期、注册用户 60 天。

Loadly↗

iOS & Android beta apps distribution service offers completely free services with unlimited downloads, high-speed downloads, and unlimited uploads.iOS 与 Android 测试版应用分发服务，提供完全免费的服务，下载不限量、高速下载、上传不限量。

DistApp↗

Manage and distribute Android, iOS and Desktop apps. Useful for tester or self distribution. Try it for free with 2 apps, 1 org, 100 MB storage with unlimited downloads, or self-hosted your self.管理与分发 Android、iOS 与桌面应用。适合测试分发或自分发。可免费试用，含 2 个应用、1 个组织、100 MB 存储与不限下载，也可自托管。

16Management System管理系统8▾

bitnami.com↗

Deploy prepared apps on IaaS. Management of 1 AWS micro instance free在 IaaS 上部署现成应用。免费管理 1 个 AWS 微型实例

Esper↗

MDM and MAM for Android Devices with DevOps. One hundred devices free with one user license and 25 MB Application Storage.面向 Android 设备并具备 DevOps 能力的 MDM 与 MAM。免费 100 台设备，含 1 个用户许可与 25 MB 应用存储。

jamf.com↗

Device management for iPads, iPhones, and Macs, three devices free面向 iPad、iPhone 与 Mac 的设备管理，免费 3 台设备

Miradore↗

Device Management service. Stay up-to-date with your device fleet and secure unlimited devices for free. The free plan offers basic features.设备管理服务。掌握设备机群状态，免费安全地管理不限量设备。免费计划提供基础功能。

ploi.io↗

Server management tool to easily manage and deploy your servers & sites. Free for one server.服务器管理工具，可轻松管理与部署你的服务器与站点。1 台服务器免费。

runcloud.io↗

Server management focusing mainly on PHP projects. Free for up to 1 server.主要面向 PHP 项目的服务器管理。最多 1 台服务器免费。

serveravatar.com↗

Manage and monitor PHP-based web servers with automated configurations. Free for one server.通过自动化配置管理与监控基于 PHP 的 Web 服务器。1 台服务器免费。

xcloud.host↗

Server management and deployment platform with a user-friendly interface. Free tier available for one server.带友好界面的服务器管理与部署平台。为 1 台服务器提供免费套餐。

17Messaging and Streaming消息队列与流处理20▾

Ably↗

Realtime messaging service with presence, persistence and guaranteed delivery. The free plan includes 3m messages per month, 100 peak connections, and 100 peak channels.实时消息服务，具备在线状态、持久化与可靠投递。免费计划含每月 300 万条消息、100 个峰值连接与 100 个峰值频道。

cloudamqp.com↗

RabbitMQ as a Service. Little Lemur plan: max 1 million messages/month, max 20 concurrent connections, max 100 queues, max 10,000 queued messages, multiple nodes in different AZ’sRabbitMQ 即服务。Little Lemur 计划：每月最多 100 万条消息、最多 20 个并发连接、最多 100 个队列、最多 10,000 条排队消息，多节点分布在不同可用区

courier.com↗

Single API for push, in-app, email, chat, SMS, and other messaging channels with template management and other features. The free plan includes 10,000 messages/mo.用一套 API 覆盖推送、应用内、邮件、聊天、短信等消息渠道，并含模板管理等功能。免费计划每月 10,000 条消息。

EMQX Serverless↗

Scalable and secure serverless MQTT broker you can get in seconds. 1M session minutes/month free forever (no credit card required).可在几秒内获得的可扩展且安全的无服务器 MQTT 代理。每月 100 万会话分钟永久免费（无需信用卡）。

Engage↗

All-in-one Customer Engagement and Automation Tool (email, push, SMS, product tours, banners and more) for SaaS. Free for up to 1,000 active users per month.面向 SaaS 的一体化客户互动与自动化工具（邮件、推送、短信、产品导览、横幅等）。每月最多 1,000 名活跃用户免费。

engagespot.co↗

Multi-channel notification infrastructure for developers with a prebuilt in-app inbox and no-code template editor. Free plan includes 10,000 messages/mo.面向开发者的多渠道通知基础设施，含预置应用内收件箱与无代码模板编辑器。免费计划每月 10,000 条消息。

HiveMQ↗

Connect your MQTT devices to the Cloud Native IoT Messaging Broker. Free to connect up to 100 devices (no credit card required) forever.把你的 MQTT 设备接入云原生 IoT 消息代理。永久免费连接最多 100 台设备（无需信用卡）。

httpSMS↗

Send and receive text messages using your Android phone as an SMS Gateway. Free to send and receive up to 200 messages per month.用你的 Android 手机作为短信网关收发短信。每月最多 200 条消息免费。

knock.app↗

Notifications infrastructure for developers. Send to multiple channels like in-app, email, SMS, Slack, and push with a single API call. The free plan includes 10,000 messages/mo.面向开发者的通知基础设施。一次 API 调用即可发往应用内、邮件、短信、Slack 与推送等多个渠道。免费计划每月 10,000 条消息。

Novu.co↗

The open-source notification infrastructure for developers. Simple components and APIs for managing all communication channels in one place: Email, SMS, Direct, In-App and Push. The free plan includes 30,000 notifications/month with 90 days of retention.面向开发者的开源通知基础设施。用简单的组件与 API 在一处管理所有沟通渠道：邮件、短信、私信、应用内与推送。免费方案含每月 30,000 条通知，保留 90 天。

Pingram.io↗

Communication infrastructure in 5 minutes. Free tier includes: 100 SMS and calls, 3000 Emails, Push, Slack, MS Teams, WhatsApp, and more.5 分钟搭好通信基础设施。免费套餐含 100 条短信与通话、3,000 封邮件，以及推送、Slack、MS Teams、WhatsApp 等。

Pocket Alert↗

Send push notifications to your iOS and Android devices. Effortlessly integrate via API or Webhooks and maintain full control over your alerts. Free plan: 50 messages per day to 1 device and 1 application.向你的 iOS 与 Android 设备发送推送通知。可通过 API 或 Webhook 轻松集成，并完全掌控你的告警。免费计划：每天 50 条消息，支持 1 台设备与 1 个应用。

pubnub.com↗

Swift, Kotlin, and React messaging at 1 million transactions each month. Transactions may contain multiple messages.每月 100 万条 Swift、Kotlin 与 React 消息事务。每个事务可包含多条消息。

pusher.com↗

Realtime messaging service. Free for up to 100 simultaneous connections and 200,000 messages/day实时消息服务。最多 100 个并发连接与每天 20 万条消息免费

scaledrone.com↗

Realtime messaging service. Free for up to 20 simultaneous connections and 100,000 events/day实时消息服务。最多 20 个并发连接与每天 10 万条事件免费

SMSGate↗

SMS Gateway for Android™ enables sending and receiving SMS messages through your devices using cloud routing. Completely free cloud service (with recommended notification for usage above 10,000 messages/day to maintain quality for all users).面向 Android 的短信网关，可通过云路由用你的设备收发短信。完全免费的云服务（若每天超过 10,000 条消息，建议注意以维持对所有用户的服务质量）。

SuprSend↗

SuprSend is a notification infrastructure that streamlines your product notifications with an API-first approach. Create and deliver transactional, crons, and engagement notifications on multiple channels with a single notification API. In free plan you get 10,000 notifications per month, including different workflow nodes such as digests, batches, multi-channels, preferences, tenants, broadcasts and more.SuprSend 是通知基础设施，以 API 优先的方式梳理产品通知。用一套通知 API 即可在多渠道创建并投递事务、定时与参与度通知。免费计划每月 10,000 条通知，含摘要、批量、多渠道、偏好、租户、广播等不同工作流节点。

synadia.com↗

NATS.io as a service. Global, AWS, GCP, and Azure. Free forever with 4k msg size, 50 active connections, and 5GB of data per month.NATS.io 托管服务。覆盖全球以及 AWS、GCP 与 Azure。永久免费档：消息大小 4k、50 个活跃连接、每月 5GB 数据。

webpushr↗

Web Push Notifications – Free for upto 10k subscribers, unlimited push notifications, in-browser messagingWeb 推送通知 —— 最多 1 万名订阅者免费，推送通知不限量，支持浏览器内消息。

vask↗

Realtime messaging service, Pusher-compatible. Dev tier is limited to local development only and free with 100 concurrent connections, 1,000,000 broadcasts/month, unlimited client events, 32kb message size.实时消息服务，兼容 Pusher。Dev 档位仅限本地开发，免费含 100 个并发连接、每月 100 万次广播、不限客户端事件与 32 KB 消息体。

18Log Management日志管理8▾

bugfender.com↗

Free up to 100k log lines/day with 24 hours retention每天最多 10 万行日志免费，保留 24 小时

log.dog↗

LogDog is a remote debugging/logging SDK (iOS and Android) with a web ui. Captures all logs, requests and events in real-time and allows to intercept them. Free for up to 100MB of logs every monthLogDog 是带 Web 界面的远程调试与日志 SDK（iOS 与 Android）。实时捕获全部日志、请求与事件，并支持拦截。每月最多 100 MB 日志免费

logflare.app↗

Free for up to 12,960,000 entries per app per month, 3 days retention每个应用每月最多 12,960,000 条记录免费，保留 3 天

logtail.com↗

ClickHouse-based SQL-compatible log management. Free up to 1 GB per month, three days retention.基于 ClickHouse 且兼容 SQL 的日志管理。每月最多 1 GB 免费，保留 3 天。

logzab.com↗

Audit trail management system. Free 1,000 user activity logs per month, 1-month retention, for up to 5 projects.审计跟踪管理系统。每月免费 1,000 条用户活动日志，保留 1 个月，最多 5 个项目。

ManageEngine Log360 Cloud↗

Log Management service powered by Manage Engine. Free Plan offers 50 GB storage with 15 days Storage Retention and 7 days search.由 ManageEngine 提供的日志管理服务。免费计划提供 50 GB 存储，保留 15 天并可搜索 7 天。

openobserve.ai↗

200 GB Ingestion/month free, 15 Days Retention每月 200 GB 免费写入量，保留 15 天

Smart Grow Logs↗

Centralized log management platform with end-to-end encryption, real-time alerts, and multi-platform SDKs. Free tier includes up to 3.000 logs per day.集中式日志管理平台，具备端到端加密、实时告警与多平台 SDK。免费套餐每天最多 3,000 条日志。

19Translation Management翻译管理15▾

AutoLocalise.com↗

Instantly localize without managing translation files. Free for up to 10,000 characters/month, unlimited languages.无需管理翻译文件即可即时完成本地化。每月最多 10,000 字符免费，不限语言。

crowdin.com↗

Unlimited projects, unlimited strings, and collaborators for Open Source项目不限量、字符串不限量，开源项目协作者不限量。

Free PO editor↗

Free for everybody对所有人免费

Lingo.dev↗

Open-source AI-powered CLI for web & mobile localization. Bring your own LLM, or use 10,000 free words every month via Lingo.dev-managed localization engine.面向 Web 与移动端本地化的开源 AI 驱动 CLI。可自带 LLM，或每月通过 Lingo.dev 托管本地化引擎免费使用 10,000 词。

lingohub.com↗

Free up to 3 users, always free for Open Source最多 3 名用户免费，对开源始终免费

Localhero.ai↗

Automatic on-brand translations on every pull request, with glossary and translation memory. Free for 1 project, 250 translation credits/month (~4,000 words).在每次 pull request 上自动完成符合品牌的翻译，含术语表与翻译记忆。1 个项目免费，每月 250 个翻译额度（约 4,000 词）。

localazy.com↗

Free for 1000 source language strings, unlimited languages, unlimited contributors, startup and open source deals1,000 条源语言字符串免费，不限语言、不限贡献者，另有创业公司与开源特别优惠

Localit↗

Fast, developer-friendly localization platform with seamless and free GitHub/GitLab integration, AI-assisted and manual translations, and a generous free plan (includes 2 users, 500 keys, and unlimited projects).快速且对开发者友好的本地化平台，提供无缝免费的 GitHub/GitLab 集成、AI 辅助与人工翻译，以及慷慨的免费计划（含 2 名用户、500 个键与不限项目）。

localizely.com↗

Free for Open Source对开源免费

Loco↗

Free up to 2000 translations, Unlimited translators, ten languages/project, 1000 translatable assets/project最多 2,000 条翻译免费，不限译者，每项目 10 种语言、1,000 个可译资源

POEditor↗

Free up to 1000 strings最多 1,000 条字符串免费

SimpleLocalize↗

Free up to 100 translation keys, unlimited strings, unlimited languages, startup deals最多 100 个翻译键免费，不限字符串与语言，另有创业公司优惠

Texterify↗

Free for a single user单用户免费

Tolgee↗

Free SaaS offering with limited translations, forever-free self-hosted version免费 SaaS，翻译量有限；并可永久免费自托管

transifex.com↗

Free for Open Source对开源免费

20Monitoring监控告警61▾

Pingzo↗

Free tier offers 1 uptime/API monitor with 15-minute check intervals and instant email alerts.免费套餐提供 1 个可用率与 API 监控，检查间隔 15 分钟，并提供即时邮件告警。

Accesserty Pulse↗

Accesserty Pulse monitors interaction signals and detectable accessibility risks on live websites. Free plans for everyone and 14-day Pro trial.Accesserty Pulse 监控线上网站的交互信号与可检测的无障碍风险。对所有人提供免费计划，以及 14 天 Pro 试用。

AlertKick↗

server security (eBPF agent for Linux), uptime monitoring, on-call alerting/status pages in one product. Free tier includes 10 uptime monitors and heartbeats, 5-minute check intervals, 7-day retention.在单一产品中提供服务器安全（面向 Linux 的 eBPF 代理）、可用性监控、值班告警 / 状态页。免费档含 10 个可用性监控与心跳、5 分钟检查间隔、7 天数据保留。

assertible.com↗

Automated API testing and monitoring. Free plans for teams and individuals.自动化 API 测试与监控。为团队与个人提供免费计划。

Better Stack↗

Uptime monitoring, incident management, on-call scheduling/alerting, and status pages in a single product. The free plan includes ten monitors with 3-minute check frequency and status pages.在单一产品中提供可用性监控、事件管理、值班排班 / 告警与状态页。免费方案含 10 个监控项，检查频率 3 分钟，并提供状态页。

bleemeo.com↗

Free for 3 servers, 5 uptime monitors, unlimited users, unlimited dashboards, unlimited alerting rules.3 台服务器、5 个可用率监控、不限用户、不限仪表盘、不限告警规则免费。

checklyhq.com↗

Open source E2E / Synthetic monitoring and deep API monitoring for developers. Free plan with one user and 10k API & network / 1.5k browser check runs.面向开发者的开源端到端与合成监控及深度 API 监控。免费计划含 1 名用户与 1 万次 API 与网络检查、1,500 次浏览器检查。

Core Web Vitals History↗

Find Core Web Vitals history for a url or a website.查询某个 URL 或网站的 Core Web Vitals 历史记录。

cronalive.com↗

Heartbeat monitoring for cron jobs, plus HTTP uptime and TLS expiry checks, and a Laravel package that creates checks from your scheduler. Free tier with 10 checks, HTTP interval from 5 min, 30 days of history, 50k pings/mo.面向定时任务的健康检查监控，另含 HTTP 可用率与 TLS 到期检查，并提供可从调度器创建检查项的 Laravel 包。免费套餐含 10 个检查项、HTTP 间隔最短 5 分钟、30 天历史与每月 5 万次 ping。

cronitor.io↗

Performance insights and uptime monitoring for cron jobs, websites, APIs and more. A free tier with five monitors.面向定时任务、网站、API 等的性能洞察与可用率监控。免费套餐含 5 个监控项。

watchcron.com↗

Cron job monitoring with heartbeat pings and alerts. Free tier with up to 5 monitors and email notifications.带心跳 ping 与告警的定时任务监控。免费套餐最多 5 个监控项与邮件通知。

datadoghq.com↗

Free for up to 5 nodes最多 5 个节点免费

DeadBro↗

Rails APM with request-based pricing: live traces, slow SQL, N+1 detection, and error tracking. Free forever for 50k requests/month, 7-day retention, 1 app, 1 uptime check, and email alerts. No credit card required.面向 Rails 的 APM，按请求数计费：实时 trace、慢 SQL、N+1 检测与错误跟踪。每月 5 万次请求永久免费，保留 7 天、1 个应用、1 个可用率检查与邮件告警。无需信用卡。

deadmanssnitch.com↗

Monitoring for cron jobs. One free snitch (monitor), more if you refer others to sign up定时任务监控。免费 1 个 snitch（监控项），推荐他人注册可获更多

downtimemonkey.com↗

60 uptime monitors, 5-minute interval. Email, Slack alerts.60 个可用率监控项，间隔 5 分钟。支持邮件与 Slack 告警。

drumbeats.io↗

Cron, heartbeat, and uptime monitoring with incident management and status pages. Free for up to 50 monitors with 1-min interval and unlimited team seats.Cron、心跳与可用率监控，含事件管理与状态页。最多 50 个监控项（间隔 1 分钟）与不限团队席位免费。

economize.cloud↗

Economize helps demystify cloud infrastructure costs by organizing cloud resources to optimize and report the same. Free for up to $5,000 spent on Google Cloud Platform every month.Economize 通过整理云资源来优化与报告，帮助厘清云基础设施成本。每月在 Google Cloud Platform 上花费不超过 5,000 美元时免费。

fivenines.io↗

Linux server monitoring with real‑time dashboards and alerting – free forever for up to 5 monitored servers at 60-seconds interval. No credit card required.具备实时仪表盘与告警的 Linux 服务器监控——最多 5 台受监控服务器、间隔 60 秒，永久免费。无需信用卡。

FlareWarden↗

Uptime, content, dependency, and SSL monitoring with multi-region verification and status pages. Free plan includes 15 monitors, 5-minute checks, and 90 days of history.可用性、内容、依赖与 SSL 监控，支持多地域校验与状态页。免费方案含 15 个监控项、5 分钟检查间隔与 90 天历史。

Grafana Cloud↗

Grafana Cloud is a composable observability platform that integrates metrics and logs with Grafana. Free: 3 users, ten dashboards, 100 alerts, metrics storage in Prometheus and Graphite (10,000 series, 14 days retention), logs storage in Loki (50 GB of logs, 14 days retention)Grafana Cloud 是可组合的可观测平台，用 Grafana 整合指标与日志。免费：3 名用户、10 个仪表盘、100 条告警，指标存储在 Prometheus 与 Graphite（10,000 个序列，保留 14 天），日志存储在 Loki（50 GB 日志，保留 14 天）

healthchecks.io↗

Monitor your cron jobs and background tasks. Free for up to 20 checks.监控你的定时任务与后台任务。最多 20 个检查项免费。

incidenthub.cloud↗

Cloud and SaaS status page aggregator – 20 monitors and 2 notification channels (Slack and Discord) are free forever.云与 SaaS 状态页聚合器 —— 20 个监控项与 2 个通知渠道（Slack 与 Discord）永久免费。

inspector.dev↗

A complete Real-Time monitoring dashboard in less than one minute with a free forever tier.一分钟内搭好完整的实时监控看板，免费套餐永久有效。

instatus.com↗

Get a beautiful status page in 10 seconds. Free forever with unlimited subs and unlimited teams.10 秒内获得精美状态页。永久免费，不限订阅者与团队。

isitdownstatus.com↗

Free public JSON API returning real-time status for 500+ popular services (GitHub, Stripe, AWS, etc.). No auth required, CORS enabled.免费公开 JSON API，返回 GitHub、Stripe、AWS 等 500 多个热门服务的实时状态。无需认证，已启用 CORS。

LastPing↗

Dead man’s switch for AI agents, cron jobs and CI. Free for individuals with unlimited monitors and destinations. Let AI agents build monitoring for everything including themselves.面向 AI 智能体、定时任务与 CI 的死人开关。对个人免费，不限监控项与通知目标。让 AI 智能体为包括它们自身在内的一切构建监控。

linkok.com↗

Online broken link checker, free for small websites up to 100 pages, completely free for open-source projects.在线死链检查器，最多 100 个页面的小型网站免费，开源项目完全免费。

loader.io↗

Free load testing tools with limitations免费负载测试工具，但有限制

MarionetteOps.com↗

Server monitoring, public status pages, and service uptime monitoring.服务器监控、公开状态页与服务可用率监控。

Middleware.io↗

Middleware observability platform provides complete visibility into your apps & stack, so you can monitor & diagnose issues at scale. They have a free forever plan for Dev community use that allows Log monitoring for up to 1M log events, Infrastructure monitoring & APM for up to 2 hosts.中间件可观测平台，提供对应用与整个技术栈的完整可见性，让你能大规模监控与诊断问题。为开发者社区提供永久免费计划，支持最多 100 万条日志事件监控，以及最多 2 台主机的基础设施监控与 APM。

MonitorMonk↗

Minimalist uptime monitoring with beautiful status pages. The Forever Free plan offers HTTPS, Keyword, SSL and Response-time monitorming for 10 websites or api-endpoints, and provides 2 dashboards/status pages.极简的可用率监控与精美状态页。永久免费计划为 10 个网站或 API 端点提供 HTTPS、关键字、SSL 与响应时间监控，并提供 2 个仪表盘与状态页。

netdata.cloud↗

Netdata is an open-source tool to collect real-time metrics. It’s a growing product and can also be found on GitHub!Netdata 是收集实时指标的开源工具。它是一款持续成长的产品，也能在 GitHub 上找到！

newrelic.com↗

New Relic observability platform built to help engineers create more perfect software. From monoliths to serverless, you can instrument everything and then analyze, troubleshoot, and optimize your entire software stack. The free tier offers 100GB/month of free data ingest, one free full-access user, and unlimited free primary users.New Relic 可观测平台，旨在帮助工程师打造更完善的软件。从单体到无服务器，你可以为一切埋点，然后分析、排障并优化整个软件栈。免费套餐每月提供 100 GB 免费数据写入、1 名免费完全访问用户与不限量的免费基础用户。

OnlineOrNot.com↗

OnlineOrNot provides uptime monitoring for websites and APIs, monitoring for cron jobs and scheduled tasks. Also provides status pages. The first five checks with a 3-minute interval are free. The free tier sends alerts via Slack, Discord, and Email.OnlineOrNot 为网站与 API 提供可用率监控，也监控定时任务与计划任务，并提供状态页。前 5 个检查项（间隔 3 分钟）免费。免费套餐通过 Slack、Discord 与邮件发送告警。

OntarioNet.ca CN Test↗

Check if a website is blocked in China by the Great Firewall. It identifies DNS pollution by comparing DNS results and ASN information detected by servers in China versus servers in the United States.检测网站是否被中国防火墙屏蔽。它通过比较中国境内服务器与美国服务器解析出的 DNS 结果与 ASN 信息，识别 DNS 污染。

pagecrawl.io↗

Monitor website changes, free for up to 6 monitors with daily checks.监控网站变化，最多 6 个监控项（每日检查）免费。

pagertree.com↗

Simple interface for alerting and on-call management. Free up to 5 users.用于告警与值班管理的简洁界面。最多 5 名用户免费。

phare.io↗

Uptime Monitoring free for up to 100,000 events for unlimited projects and unlimited status pages.可用性监控最多 100,000 个事件免费，项目数不限、状态页不限。

pingbreak.com↗

Modern uptime monitoring service. Check unlimited URLs and get downtime notifications via Discord, Slack, or email.现代化的可用率监控服务。可检查不限数量的 URL，并通过 Discord、Slack 或邮件获得宕机通知。

Pingmeter.com↗

5 uptime monitors with 10-minute interval. Monitor SSH, HTTP, HTTPS, and any custom TCP ports.5 个可用率监控项，间隔 10 分钟。可监控 SSH、HTTP、HTTPS 及任意自定义 TCP 端口。

pingpong.one↗

Advanced status page platform with monitoring. The free tier includes one public customizable status page with an SSL subdomain. Pro plan is offered to open-source projects and non-profits free of charge.带监控的高级状态页平台。免费套餐含 1 个可自定义的公开状态页与 SSL 子域名。开源项目与非营利组织可免费获得 Pro 计划。

Prismix↗

Free REST API (GET /api/v1/statuses) returning real-time operational status for 75+ AI services including OpenAI, Anthropic, Gemini, Mistral, and more. No authentication required. [Free tier available with Pro at $10/month]免费 REST API（GET /api/v1/statuses），返回 OpenAI、Anthropic、Gemini、Mistral 等 75 个以上 AI 服务的实时运行状态。无需认证。[免费套餐可用，Pro 版每月 10 美元]

Pulsetic↗

10 monitors, 6 Months of historical Uptime/Logs, unlimited status pages, and custom domains included! For infinite time and unlimited email alerts for free. You don’t need a credit card.10 个监控项、6 个月的历史可用率与日志、无限状态页并含自定义域名。无限时长与无限邮件告警免费。无需信用卡。

robusta.dev↗

Powerful Kubernetes monitoring based on Prometheus. Bring your own Prometheus or install the all-in-one bundle. The free tier includes up to 20 Kubernetes nodes. Alerts via Slack, Microsoft Teams, Discord, and more. Integrations with PagerDuty, OpsGenie, VictorOps, DataDog, and many other tools.基于 Prometheus 的强大 Kubernetes 监控。可自带 Prometheus，或安装一体化捆绑包。免费套餐最多 20 个 Kubernetes 节点。支持通过 Slack、Microsoft Teams、Discord 等发送告警。可集成 PagerDuty、OpsGenie、VictorOps、DataDog 等大量工具。

Runframe↗

On-call alerting, incident management, and public/private status pages. The free plan includes up to 5 users, 1 team, 1 on-call schedule, basic status pages, incident lifecycle, and Slack-native incident response.值班告警、事件管理与公开及私有状态页。免费计划含最多 5 名用户、1 个团队、1 个值班表、基础状态页、事件生命周期与 Slack 原生的事件响应。

Servervana↗

Advanced uptime monitoring with support for large projects and teams. Provides HTTP monitoring, Browser based monitoring, DNS monitoring, domain monitoring, status pages and more. The free tier includes 10 HTTP monitors, 1 DNS monitor and one status page.面向大型项目与团队的高级可用率监控。提供 HTTP 监控、浏览器监控、DNS 监控、域名监控、状态页等。免费套餐含 10 个 HTTP 监控、1 个 DNS 监控与 1 个状态页。

Simple Observability↗

Powerful server monitoring in a unified platform for metrics and logs, with no setup complexity. Free for one server.在统一平台中进行强大的服务器监控，整合指标与日志，配置不复杂。1 台服务器免费。

sitesure.net↗

Website and cron monitoring – 2 monitors free网站与定时任务监控 —— 2 个监控项免费。

skylight.io↗

Free for first 100,000 requests (Rails only)前 100,000 次请求免费（仅限 Rails）

statuscake.com↗

Website monitoring, unlimited tests free with limitations网站监控，测试次数不限免费但有额度限制。

statusgator.com↗

Status page monitoring, 3 monitors free状态页监控，免费 3 个监控项

supaguard.app↗

Synthetic monitoring from 20+ global regions. The free tier includes 1,000 browser checks/mo with AI-driven self-healing and automated test generation.来自 20 多个全球区域的合成监控。免费套餐含每月 1,000 次浏览器检查，并具备 AI 驱动的自愈与自动化测试生成。

superlog.sh↗

Open-source OpenTelemetry observability (traces, logs, and metrics) with AI-agent incident investigation. The free tier includes 1M spans, 5M logs, and 10M metric points per month with 30-day retention, no credit card required. Fully open-source and self-hostable.开源的 OpenTelemetry 可观测能力（trace、日志与指标），并具备 AI 智能体事件调查能力。免费套餐含每月 100 万 span、500 万日志与 1,000 万指标点，保留 30 天，无需信用卡。完全开源且可自托管。

SweetUptime↗

Server monitoring, uptime monitoring, DNS & domain monitoring. Monitor 10 server, 10 uptime, and 10 domain for free.服务器监控、可用率监控与 DNS 及域名监控。免费监控 10 台服务器、10 个可用率与 10 个域名。

syagent.com↗

Noncommercial free server monitoring service, alerts and metrics.非商业用途免费的服务器监控服务，含告警与指标。

UptimeObserver.com↗

Get 20 uptime monitors with 5-minute intervals and a customizable status page-even for commercial use. Enjoy unlimited, real-time notifications via email and Telegram. No credit card needed to get started.获得 20 个可用率监控，间隔 5 分钟，并可自定义状态页，商用亦可。可通过邮件与 Telegram 获得不限量的实时通知。开始使用无需信用卡。

uptimetoolbox.com↗

Free monitoring for five websites, 3-minute intervals, public statuspage.5 个网站的免费监控，间隔 3 分钟，含公开状态页。

Wachete↗

monitor five pages, checks every 24 hours.监控 5 个页面，每 24 小时检查一次。

Watchgoose↗

Cron job and heartbeat monitoring and status pages for scheduled tasks, backups and background jobs, MCP server available. Free tier: 10 checks, 200 ping log entries, email/chat/webhook alerts, no credit card. Open Source support program for qualifying OS projects.面向定时任务、备份与后台任务的 Cron 与心跳监控及状态页，提供 MCP server。免费套餐：10 个检查项、200 条 ping 日志、邮件与聊天与 Webhook 告警，无需信用卡。符合条件开源项目可加入开源支持计划。

Xitoring.com↗

Uptime monitoring: 20 free, Linux and Windows Server monitoring: 5 free, Status page: 1 free – Mobile app, multiple notification channel, and much more!可用性监控免费 20 个，Linux 与 Windows 服务器监控免费 5 个，状态页免费 1 个 —— 另有移动应用、多种通知渠道等等！

UptimeRobot↗

Free uptime monitoring for hobby projects. Includes 50 monitors with 5-minute check intervals, supports HTTP, ping, port, and keyword monitoring.面向业余项目的免费可用率监控。含 50 个监控项，检查间隔 5 分钟，支持 HTTP、ping、端口与关键字监控。

21Crash and Exception Handling崩溃与异常处理15▾

Axiom↗

Store up to 0.5 TB of logs with 30-day retention. Includes integrations with platforms like Vercel and advanced data querying with email/Discord notifiers.最多存储 0.5 TB 日志并保留 30 天。可与 Vercel 等平台集成，并提供带邮件与 Discord 通知的高级数据查询。

Bugsink↗

Error-tracking with Sentry-SDK compatibility. Free for up to 5,000 errors/month, or unlimited use when self-hosted.兼容 Sentry SDK 的错误跟踪。每月最多 5,000 个错误免费，自托管则不限量。

bugsnag.com↗

Free for up to 2,000 errors/month after the initial trial初始试用期后，每月最多 2,000 个错误免费

CatchJS.com↗

JavaScript error tracking with screenshots and click trails. Free for open-source projects.带截图与点击轨迹的 JavaScript 错误跟踪。开源项目免费。

elmah.io↗

Error logging and uptime monitoring for web developers. Free Small Business subscription for open-source projects.面向 Web 开发者的错误日志与可用率监控。开源项目可免费获得 Small Business 订阅。

Embrace↗

Mobile app monitoring. Free for small teams with up to 1 million user sessions per year.移动应用监控。小型团队免费，每年最多 100 万次用户会话。

exceptionless↗

Real-time error, feature, log reporting, and more. Free for 3k events per month/1 user. Open source and easy to self-host for unlimited use.实时错误、功能与日志上报等。每月 3,000 条事件与 1 名用户免费。开源且易于自托管，自托管后不限量。

GlitchTip↗

Simple, open-source error tracking. Compatible with open-source Sentry SDKs. 1000 events per month for free, or can self-host with no limits简单开源的错误跟踪。兼容开源 Sentry SDK。每月免费 1,000 条事件，也可自托管且不限量

honeybadger.io↗

Exception, uptime, and cron monitoring. Free for small teams and open-source projects (12,000 errors/month).异常、可用率与定时任务监控。小型团队与开源项目免费（每月 12,000 个错误）。

Jam↗

Developer friendly bug reports in one click. Free plan with unlimited jams.一键生成对开发者友好的缺陷报告。免费计划不限 jam 数量。

memfault.com↗

Cloud device observability and debugging platform. 100 devices free for Nordic, NXP, and Laird devices.云设备可观测与调试平台。对 Nordic、NXP 与 Laird 设备免费支持 100 台。

rollbar.com↗

Exception and error monitoring, free plan with 5,000 errors/month, unlimited users, 30 days retention异常与错误监控。免费计划每月 5,000 个错误、不限用户、保留 30 天

Semaphr↗

Free all-in-one kill switch for your mobile apps.面向移动应用的免费一体化终止开关。

sentry.io↗

Sentry tracks app exceptions in real-time and has a small free plan. Free for 5k errors per month/ 1 user, unrestricted use if self-hostedSentry 实时跟踪应用异常，并提供小型免费计划。每月 5,000 个错误与 1 名用户免费，自托管则不受限制

Whitespace↗

One-click bug reports straight in your browser. Free plan with unlimited recordings for personal use.在浏览器中一键提交缺陷报告。免费计划个人使用可不限录制次数。

22Search搜索4▾

algolia.com↗

Hosted search solution with typo-tolerance, relevance, and UI libraries to easily create search experiences. The free “Build” plan includes 1M documents and 10K searches/month. Also offers developer documentation search for free.托管搜索方案，支持容错拼写、相关性排序与 UI 组件库，便于快速打造搜索体验。免费 Build 计划含 100 万文档与每月 1 万次搜索。还免费提供开发者文档搜索。

bonsai.io↗

Free 1 GB memory and 1 GB storage免费 1 GB 内存与 1 GB 存储

CommandBar↗

Unified Search Bar as-a-service, web-based UI widget/plugin that allows your users to search contents, navigations, features, etc. within your product, which helps discoverability. Free for up to 1,000 Monthly Active Users, unlimited commands.统一搜索栏即服务，一个基于 Web 的 UI 组件 / 插件，让你的用户可以在产品内搜索内容、导航、功能等，有助于提升可发现性。月活跃用户不超过 1,000 时免费，命令数不限。

searchly.com↗

Free 2 indices and 20 MB storage免费 2 个索引与 20 MB 存储

23Education and Career Development教育与职业发展21▾

Cisco Networking Academy, Skills for All↗

Offers free certification-aligned courses in topics like cybersecurity, networking, and Python.提供与认证对齐的免费课程，涵盖网络安全、网络与 Python 等主题。

CloudCertPrep↗

Free, open-source AWS certification practice exams with 1,050+ questions for CLF-C02. Features timed mock exams, domain practice, spaced repetition, and progress tracking.免费开源的 AWS 认证练习题，含 1,050 多道 CLF-C02 题目。具备限时模拟考试、分领域练习、间隔重复与进度跟踪。

CodeTrain↗

AI coding tutor that teaches you on your own codebase and never writes the code for you. Free tier: 10 in-browser lessons/month, Python/JS run client-side, no card required.AI 编程导师，基于你自己的代码库教学且从不替你写代码。免费套餐：每月 10 节浏览器内课程，Python/JS 在客户端运行，无需信用卡。

DeepLearning.AI Short Courses↗

Free short courses from industry-leading experts to get hands-on experience with the latest generative AI tools and techniques in an hour or less.来自行业顶尖专家的免费短课程，用一小时或更少时间动手体验最新的生成式 AI 工具与技术。

DevOpsLesson↗

Free DevOps tutorials, cheatsheets, troubleshooting guides, roadmaps, interview preparation and DevOps tools: Dockerfile Linter, K8S YAML file generator, Regex Tester.免费 DevOps 教程、速查表、排障指南、学习路线、面试准备与 DevOps 工具：Dockerfile Linter、K8S YAML 文件生成器、正则测试器。

DevNet Academy↗

Free, self-paced training for the Cisco DevNet Expert / CCIE Automation certification. Covers Python Click and Flask-RESTx.面向 Cisco DevNet Expert 与 CCIE Automation 认证的免费自主学习培训，涵盖 Python Click 与 Flask-RESTx。

Django-tutorial.dev↗

Free online guides for learning Django as their first framework & gives free dofollow backlink to articles written by users.免费在线指南，帮助把 Django 作为第一个框架来学习，并为用户撰写的文章提供免费 dofollow 外链。

edX↗

Offers access to over 4,000 free online courses from 250 leading institutions, including Harvard and MIT, specializing in computer science, engineering, and data science.提供来自 250 所顶尖院校（含哈佛与 MIT）的 4,000 多门免费在线课程，专注计算机科学、工程与数据科学。

Exercism↗

Free, open-source programming education in over 75 programming languages, with human mentoring. A nonprofit organisation.免费开源的编程教育，覆盖 75 种以上编程语言，并提供真人导师。非营利组织。

Free Professional Resume Templates & Editor↗

Free platform with lots of Resume templates of Experienced Professionals, ready to clone and edit fully and download, ATS optimized.免费平台，提供大量资深专业人士的简历模板，可直接复制、完整编辑并下载，且经过 ATS 优化。

FreeCodeCamp↗

Open-source platform offering free courses and certifications in Data Analysis, Information Security, Web Development, and more.开源平台，免费提供数据分析、信息安全、Web 开发等课程与认证。

Full Stack Open↗

Free university-level course on modern web development with React, Node.js, GraphQL, TypeScript, and more. Fully online and self-paced.免费大学级别课程，讲解 React、Node.js、GraphQL、TypeScript 等现代 Web 开发。完全在线、自主进度。

Interactive CV↗

AI-powered resume builder with real-time editing and ATS optimization. Free tier includes automatic CV conversion to premium templates (Harvard, Europass), PDF export, job tracker with unlimited job posting insights and CV sharing with chat/voice features.AI 简历生成器，支持实时编辑与 ATS 优化。免费套餐含自动把简历转换为高级模板（Harvard、Europass）、导出 PDF、求职跟踪（不限量职位洞察）以及带聊天与语音功能的简历分享。

Khan Academy↗

Free online guides for learning basic and advanced HTML/CSS, JavaScript and SQL.免费在线指南，学习基础与进阶的 HTML/CSS、JavaScript 与 SQL。

LabEx↗

Develop skills in Linux, DevOps, Cybersecurity, Programming, Data Science, and more through interactive labs and real-world projects.通过交互式实验与真实项目，提升 Linux、DevOps、网络安全、编程、数据科学等方面的技能。

MIT OpenCourseWare↗

MIT OpenCourseWare is an online publication of materials from over 2,500 MIT courses, freely sharing knowledge with learners and educators around the world. Youtube channel can be found at @mitocwMIT OpenCourseWare 是 MIT 2,500 多门课程资料的在线发布平台，免费与全球学习者与教育者共享知识。YouTube 频道见 @mitocw

Reactive Resume↗

Free, open-source resume builder with dozens of templates. Exports to PDF, DOCX and also provides a publicly shareable link to the resume (opt-in).免费开源的简历构建器，含数十个模板。可导出 PDF 与 DOCX，并可选择生成公开可分享的简历链接。

Roadmap.sh↗

Free learning roadmaps covering all aspects of development from Blockchain to UX Design.免费学习路线图，覆盖从区块链到 UX 设计的开发各个方面。

The Odin Project↗

Free, open-source platform with a curriculum focused on JavaScript and Ruby for web development.免费开源平台，课程聚焦 Web 开发所需的 JavaScript 与 Ruby。

W3Schools↗

Offers free tutorials on web development technologies like HTML, CSS, JavaScript, and more.提供 HTML、CSS、JavaScript 等 Web 开发技术的免费教程。

WebTerm Learn↗

Learn the Linux terminal, Git and Vim in a simulated terminal in the browser. All 129 lessons are free; the first lesson of each course needs no account.在浏览器模拟终端中学习 Linux 终端、Git 与 Vim。全部 129 节课免费；每门课的第一节无需账号。

24Email邮件服务75▾

Unitpost↗

AI-First Transactional & Marketing Email Service. Free tier: 5,000 emails/mo, 200 emails/day, 10,000 contacts, 5 domains. No credit card required. SDKs, MCP and REST API available.AI 优先的事务与营销邮件服务。免费套餐：每月 5,000 封邮件、每天 200 封、10,000 个联系人、5 个域名。无需信用卡。提供 SDK、MCP 与 REST API。

10minutemail↗

Free, temporary email for testing.用于测试的免费临时邮箱。

AhaSend↗

Transactional email service, free for 1000 emails per month, with unlimited domains, team members, webhooks and message routes in the free plan.触发式邮件服务，每月 1,000 封免费，免费方案包含不限域名、团队成员、Webhook 与消息路由。

AnonAddy↗

Open-source anonymous email forwarding, create unlimited email aliases for free开源匿名邮件转发，可免费创建不限量的邮箱别名

anon.li Alias↗

Open source, anonymous email alias/forwarding solution with PGP encryption, reply capability, 10 random & 1 custom alias on the free plan with developer API & CLI.开源、匿名的邮箱别名与转发方案，支持 PGP 加密与回复功能。免费计划含 10 个随机别名与 1 个自定义别名，并提供开发者 API 与 CLI。

Antideo↗

10 API requests per hour for email verification, IP, and phone number validation in the free tier. No Credit Cards are required.免费套餐每小时 10 次 API 请求，用于邮箱验证、IP 与手机号校验。无需信用卡。

Anypost↗

transactional and broadcast email API. 3,000 emails/month free, then as low as 8¢ per 1k触发式与群发邮件 API。每月 3,000 封免费，之后低至每千封 8 美分。

Atomic Mail↗

Email built for AI agents, entirely free. Programmatic inbox creation, custom domains, and full send/receive over the open JMAP standard (RFC 8620/8621); hosted MCP server available. A real mailbox service, not disposable/temporary email.为 AI 智能体打造的邮件服务，完全免费。可通过编程创建收件箱、使用自定义域名，并基于开放的 JMAP 标准（RFC 8620/8621）完整收发；提供托管 MCP server。这是真实邮箱服务，而非一次性或临时邮箱。

Brevo↗

9,000 emails/month, 300 emails/day free每月 9,000 封邮件，每天 300 封免费

Bump↗

Free 10 Bump email addresses, one custom domain免费 10 个 Bump 邮箱地址，1 个自定义域名

Burnermail↗

Free 5 Burner Email Addresses, 1 Mailbox, 7-day Mailbox History免费 5 个一次性邮箱地址、1 个邮箱、7 天邮箱历史

Buttondown↗

Newsletter service. Up to 100 subscribers free新闻通讯服务。最多 100 名订阅者免费

Canny Pigeons↗

DMARC monitoring platform with DNS drift alerts, IP threat intel and unlimited users. First domain is free – no credit card required.DMARC 监控平台，具备 DNS 漂移告警、IP 威胁情报与不限用户。首个域名免费，无需信用卡。

Conduit↗

Turn incoming emails into webhooks to trigger your API from emails. The service is completely free.把收到的邮件转成 Webhook，让你可以通过邮件触发 API。该服务完全免费。

Contact.do↗

Contact form in a link (bitly for contact forms)以链接形式提供的联系表单（联系表单界的 bitly）

debugmail.io↗

Easy to use testing mail server for developers面向开发者的易用测试邮件服务器

dkimvalidator.com↗

Test if the email’s DNS/SPF/DKIM/DMARC settings are correct, free service by roundsphere.com检测邮箱的 DNS/SPF/DKIM/DMARC 设置是否正确，由 roundsphere.com 提供的免费服务。

DNSExit↗

Up to 2 Email addresses under your domain for free with 100MB of storage space. IMAP, POP3, SMTP, SPF/DKIM support.免费提供你域名下最多 2 个邮箱地址，含 100MB 存储空间。支持 IMAP、POP3、SMTP、SPF/DKIM。

Email Spam Tester↗

Tests the technical part, content, link authority and overall score of your email. Also tests where your email will land: inbox, spam or promotions. Inbox tests on Gmail, GMX, Yahoo, AOL and other email providers. Free to use, no card or registration required. Also works via API and MCP.检测邮件的技术项、内容、链接权威度与综合评分，并测试邮件会落入收件箱、垃圾箱还是推广标签。支持 Gmail、GMX、Yahoo、AOL 等邮箱服务商的收件箱测试。免费使用，无需信用卡或注册。也可通过 API 与 MCP 调用。

EmailGuard↗

Block disposable emails, catch typos, and validate MX records via a simple API. 100 free requests/month.通过简单 API 拦截一次性邮箱、捕捉拼写错误并校验 MX 记录。每月 100 次免费请求。

EmailJS↗

This is not an entire email server; this is just an email client that you can use to send emails right from the client without exposing your credentials, the free tier has 200 monthly requests, 2 email templates, Requests up to 50Kb, Limited contacts history.这不是完整的邮件服务器，只是一个邮件客户端，你可以直接在客户端发信而不暴露自己的凭据。免费档含每月 200 次请求、2 个邮件模板、单次请求最大 50Kb、有限的联系人历史。

EmailLabs.io↗

Send up to 9,000 Emails for free every month, up to 300 emails daily.每月免费发送最多 9,000 封邮件，每天最多 300 封。

EmailQo Email Infrastructure Grader↗

Free email infrastructure grader that checks SPF, DKIM, DMARC and mail server configuration. Scores any domain out of 100. No signup required.免费的邮件基础设施评分工具，检查 SPF、DKIM、DMARC 与邮件服务器配置，为任意域名打出百分制评分。无需注册。

EmailOctopus↗

Up to 2,500 subscribers and 10,000 emails per month free最多 2,500 名订阅者，每月 10,000 封邮件免费。

Emailvalidation.io↗

100 free email verifications per month每月 100 次免费邮箱验证

Emitlo↗

free 12,000 emails/month, Email API and SMTP, SPF/DKIM/DMARC support, No Credit Cards are required.每月免费 12,000 封邮件，提供邮件 API 与 SMTP，支持 SPF/DKIM/DMARC，无需信用卡。

EtherealMail↗

Ethereal is a fake SMTP service, mainly aimed at Nodemailer and EmailEngine users (but not limited to). It’s an entirely free anti-transactional email service where messages never get delivered.Ethereal 是一个假 SMTP 服务，主要面向 Nodemailer 与 EmailEngine 用户（但不限于此）。它完全免费，属于反事务邮件服务，消息永远不会真正投递。

forwardemail.net↗

Free email forwarding for custom domains. Create and forward an unlimited amount of email addresses with your domain name (**note**: You must pay if you use .casa, .cf, .click, .email, .fit, .ga, .gdn, .gq, .lat, .loan, .london, .men, .ml, .pl, .rest, .ru, .tk, .top, .work TLDs due to spam)面向自定义域名的免费邮件转发。可为你的域名创建并转发不限数量的邮箱地址（**注意**：由于垃圾邮件问题，若使用 .casa、.cf、.click、.email、.fit、.ga、.gdn、.gq、.lat、.loan、.london、.men、.ml、.pl、.rest、.ru、.tk、.top、.work 等顶级域名则需付费）

Imitate Email↗

Sandbox Email Server for testing email functionality across build/qa and ci/cd. Free accounts get 15 emails a day forever.用于在构建、QA 与 CI/CD 中测试邮件功能的沙箱邮件服务器。免费账号每天 15 封邮件，永久有效。

ImprovMX↗

Free email forwarding.免费邮件转发。

Inboxes App↗

Create up to 3 temporary emails a day, then delete them when you’re done from within a handy Chrome extension. Perfect for testing signup flows.每天可创建最多 3 个临时邮箱，用完后通过便捷的 Chrome 扩展删除。非常适合测试注册流程。

inboxkitten.com↗

Free temporary/disposable email inbox, with up to 3-day email auto-deletes. Open source and can be self-hosted.免费的临时与一次性邮箱收件箱，邮件最多 3 天后自动删除。开源且可自托管。

Is It Disposable↗

Detect and block disposable email addresses. Free plan of 250 lookups a month and no card required.检测并拦截一次性邮箱地址。免费计划每月 250 次查询，无需信用卡。

KaiMail↗

Email forwarding for custom domains with ARC/DKIM signing. Free plan includes 1 domain, 1 mailbox, 300 emails/month, and up to 1MB message size. Email receiving webhook also available. Special plans for open-source projects.支持自定义域名的邮件转发，带 ARC/DKIM 签名。免费计划含 1 个域名、1 个邮箱、每月 300 封邮件与最大 1 MB 邮件体积，也提供收信 Webhook。开源项目有专门计划。

mail-tester.com↗

Test if the email’s DNS/SPF/DKIM/DMARC settings are correct, 20 free/month.检测邮箱的 DNS/SPF/DKIM/DMARC 设置是否正确，每月免费 20 次。

Maileroo↗

SMTP relay and email API for developers. 5,000 emails per month, unlimited domains, free email verification, blacklist monitoring, mail tester and more.面向开发者的 SMTP 中继与邮件 API。每月 5,000 封邮件、不限域名、免费邮箱验证、黑名单监控、邮件测试等。

mailcatcher.me↗

Catches mail and serves it through a web interface.捕获邮件并通过 Web 界面提供查看。

mailchannels.com↗

Email API with REST API and SMTP integrations, free for upto 3,000 emails/month.邮件 API，提供 REST API 与 SMTP 集成，每月最多 3,000 封邮件免费。

Mailcheck.ai↗

Prevent users to sign up with temporary email addresses, 120 requests/hour (~86,400 per month)阻止用户使用临时邮箱注册，每小时 120 次请求（约每月 86,400 次）

Maildroppa↗

Up to 100 subscribers and unlimited emails as well as automations for free.最多 100 名订阅者，邮件与自动化均不限量，全部免费。

MailerLite.com↗

1,000 subscribers/month, 12,000 emails/month free每月 1,000 名订阅者，每月 12,000 封邮件免费

MailerSend.com↗

Email API, SMTP, 500 emails/month free for transactional emails, 100 API requests/day邮件 API 与 SMTP，事务邮件每月免费 500 封，每天 100 次 API 请求

mailinator.com↗

Free, public email system where you can use any inbox you want免费的公共邮件系统，可使用任意你想要的收件箱

Mailjet↗

6,000 emails/month free (200 emails daily sending limit)每月 6,000 封免费邮件（每天发送上限 200 封）

mailsac.com↗

Free API for temporary email testing, free public email hosting, outbound capture, email-to-slack/websocket/webhook (1,500 monthly API limit)用于临时邮件测试的免费 API、免费公开邮件托管、出站捕获、邮件转 Slack 与 WebSocket 与 Webhook（每月 API 上限 1,500 次）

Mailtrap.io↗

Email API and SMTP with 4,000 emails/month free, limited to 150 emails/day. Email Marketing includes 500 contacts and 1,500 emails/month. Email Sandbox includes 50 test emails/month, one sandbox, and up to 10 stored emails.邮件 API 与 SMTP，每月免费 4,000 封邮件，每天限 150 封。邮件营销含 500 个联系人与每月 1,500 封邮件。邮件沙箱含每月 50 封测试邮件、1 个沙箱与最多 10 封留存邮件。

Mutant Mail↗

Free 10 Email IDs, 1 Domain, 1 Mailbox. Single Mailbox for All Email IDs.免费 10 个邮箱地址、1 个域名、1 个邮箱。所有邮箱地址共用一个邮箱。

OneSignal↗

10,000 emails/month,No Credit Cards are required.每月 10,000 封邮件免费，无需信用卡。

Orbisearch↗

Free bulk email validator, 100 validations per day, no signup required.免费批量邮箱验证器，每天 100 次验证，无需注册。

Parsio.io↗

Free email parser (Forward email, extract the data, send it to your server)免费的邮件解析器（转发邮件、提取数据并发送到你的服务器）

Plunk↗

3K emails/month for free每月 3,000 封免费邮件

Postmark↗

100 emails/month free, unlimited DMARC weekly digests.每月 100 封免费邮件，每周无限 DMARC 摘要

Proton Mail↗

Free secure email account service provider with built-in end-to-end encryption. Free 1GB storage.免费安全邮箱服务商，内置端到端加密。免费 1 GB 存储。

Reloop↗

Transactional email API and SMTP for developers. Free plan: 3,000 emails/month, 200 emails/day, one custom domain and one agent inbox.面向开发者的触发式邮件 API 与 SMTP。免费方案：每月 3,000 封、每天 200 封，1 个自定义域名与 1 个智能体收件箱。

Resend↗

Transactional emails API for developers. 3,000 emails/month, 100 emails/day free, one custom domain.面向开发者的触发式邮件 API。每月 3,000 封、每天 100 封免费，1 个自定义域名。

SendBridge Mail Tester↗

Free email deliverability test with no signup. Generates a unique inbox address, then analyzes SPF, DKIM, DMARC, Rspamd spam score, 23+ RBL blacklists, reverse DNS, and content quality. Unlimited tests, results in seconds, shareable report pages.免费的邮件送达率测试，无需注册。生成一个唯一收件地址，然后分析 SPF、DKIM、DMARC、Rspamd 垃圾评分、23 个以上 RBL 黑名单、反向 DNS 与内容质量。测试不限次数，几秒出结果，报告页可分享。

Sender↗

Up to 15,000 emails/month, up to 2,500 subscribers每月最多 15,000 封邮件，最多 2,500 名订阅者。

Sendpulse↗

500 subscribers/month, 15,000 emails/month free每月 500 名订阅者，每月 15,000 封邮件免费

SendRaven↗

SendRaven provides an email API for transactional email and agent-driven conversations, including inbound replies and threads. The free tier includes 3,000 outbound emails per month, unlimited contacts and inbound replies, card is required.SendRaven 提供面向事务邮件与智能体驱动对话的邮件 API，含入站回复与线程。免费套餐含每月 3,000 封出站邮件、不限联系人与入站回复，需信用卡。

SendStreak↗

Email framework as a service, that adds templates, automations, history, etc to your own SMTP server (E.g. AWS, Maileroo, Gmail). Free up to 100 emails/day, no time limit.邮件框架即服务，为你自己的 SMTP 服务器（如 AWS、Maileroo、Gmail）加上模板、自动化、历史记录等。每天最多 100 封邮件免费，无时间限制。

SimpleLogin↗

Open source, self-hostable email alias/forwarding solution. Free 10 Aliases, unlimited bandwidth, unlimited reply/send. Free for educational staff (student, researcher, etc.).开源、可自托管的邮箱别名与转发方案。免费 10 个别名、不限带宽、不限回复与发送。教育工作者（学生、研究者等）免费。

SMTPfast↗

SMTPfast is a simple email API for developers with a free tier that includes 3,000 emails/month, 1 domain, and 1,000 contacts, with no credit card required.SMTPfast 是面向开发者的简易邮件 API，免费套餐含每月 3,000 封邮件、1 个域名与 1,000 个联系人，无需信用卡。

Substack↗

Unlimited free newsletter service. Start paying when you charge for it.邮件订阅服务不限量免费。当你开始对订阅收费时才需付费。

Suped↗

A user-friendly DMARC monitoring platform. The free plan covers one domain with up to 1,000 emails per month.易用的 DMARC 监控平台。免费计划覆盖 1 个域名，每月最多 1,000 封邮件。

Sweego↗

European transactional emails API for developers. 100 emails/day free.面向开发者的欧洲事务邮件 API。每天 100 封免费。

temp-mail.io↗

Free disposable temporary email service with multiple emails at once and forwarding免费的一次性临时邮箱服务，可同时使用多个邮箱并支持转发

Temp-Mail.org↗

Temporary / Disposable Mail Gen Utilizing a range variety of domain. Email Address refreshes every time the page is reloaded. It is entirely free and does not include any pricing for their services.临时 / 一次性邮箱生成器，使用多种域名。每次刷新页面邮箱地址都会更换。完全免费，其服务没有任何收费项。

TempMailDetector.com↗

Verify up to 200 emails a month for free and see if an email is temporary or not.每月最多免费校验 200 个邮箱，并判断邮箱是否为临时邮箱。

trashmail.com↗

Free disposable email addresses with forwarding and automatic address expiration免费一次性邮箱地址，支持转发与地址自动过期

Tuta↗

Free secure email account service provider with built-in end-to-end encryption, no ads, no tracking. Free 1GB storage, one calendar (Tuta also have an paid plan.). Tuta is also partially open source, so you can self-host.免费安全邮箱服务商，内置端到端加密，无广告、无追踪。免费 1 GB 存储与 1 个日历（Tuta 也提供付费计划）。Tuta 还部分开源，因此你可以自托管。

Verifalia↗

Real-time email verification API with mailbox confirmation and disposable email address detector; 25 free email verifications/day.实时邮箱验证 API，含邮箱确认与一次性邮箱识别；每天 25 次免费邮箱验证。

verimail.io↗

Bulk and API email verification service. 100 free verifications/month批量与 API 邮箱验证服务。每月 100 次免费验证

Waitlio↗

Waitlist management software for product launches. Create branded waitlist pages, collect and verify email subscribers, manage signups with tags and analytics. Free plan includes 100 subscribers/month, 1 waitlist, and API access.面向产品发布的候补名单管理软件。创建品牌化候补页面、收集并校验邮件订阅者、用标签与分析管理报名。免费方案含每月 100 名订阅者、1 个候补名单与 API 访问。

Wraps↗

Email infrastructure deployed to your own AWS account (SES), with a dashboard. Pay AWS directly for sending. Free plan covers 1 AWS account, unlimited domains and contacts.部署到你自己 AWS 账号（SES）的邮件基础设施，并提供仪表盘。发送费用直接付给 AWS。免费计划覆盖 1 个 AWS 账号、不限域名与联系人。

ZeroSMTP↗

Free SMTP relay on the msgwing.com domain, up to 200 emails/day, no paid tier. Sends from a shared @msgwing.com address only (no custom domain). Ready-to-run code examples in 15 languages plus Windows Server/Linux/network printer setup guides.在 msgwing.com 域名上的免费 SMTP 中继，每天最多 200 封邮件，无付费档位。仅能从共享的 @msgwing.com 地址发送（不支持自定义域名）。提供 15 种语言的即用代码示例，以及 Windows Server、Linux 与网络打印机的配置指南。

25Feature Toggles Management Platforms功能开关管理平台8▾

Abby↗

Open-Source feature flags & A/B testing. Configuration as Code & Fully Typed Typescript SDKs. Strong integration with Frameworks such as Next.js & React. Generous free tier and cheap scaling options.开源功能开关与 A/B 测试。配置即代码，提供完全类型化的 TypeScript SDK。与 Next.js、React 等框架深度集成。慷慨的免费套餐与低价的扩展选项。

ConfigCat↗

ConfigCat is a developer-centric feature flag service with unlimited team size, excellent support, and a reasonable price tag. Free plan up to 10 flags, two environments, 1 product, and 5 Million requests per month.ConfigCat 是面向开发者的功能开关服务，团队规模不限、支持出色、价格合理。免费计划含最多 10 个开关、2 个环境、1 个产品与每月 500 万次请求。

Flagsmith↗

Release features with confidence; manage feature flags across web, mobile, and server-side applications. Use our hosted API, deploy to your own private cloud, or run on-premise.有底气地发布功能；在 Web、移动端与服务端应用中管理功能开关。可使用我们的托管 API、部署到你自己的私有云，或本地部署。

GrowthBook↗

Open source feature flag and A/B testing provider with built-in Bayesian statistical analysis engine. Free for up to 3 users, unlimited feature flags and experiments.开源功能开关与 A/B 测试服务商，内置贝叶斯统计分析引擎。最多 3 名用户、不限功能开关与实验免费。

Rollgate↗

EU-hosted feature flag management with scheduled releases, instant rollback, and A/B testing. 12 SDKs included. Free plan up to 500K API requests/month, unlimited flags, 3 team members, no credit card required.欧盟托管的特性开关管理，支持定时发布、即时回滚与 A/B 测试。内置 12 个 SDK。免费计划每月最多 50 万次 API 请求、不限开关、3 名团队成员，无需信用卡。

Hypertune↗

Type-safe feature flags, A/B testing, analytics and app configuration, with Git-style version control and synchronous, in-memory, local flag evaluation. Free for up to 5 team members with unlimited feature flags and A/B tests.类型安全的特性开关、A/B 测试、分析与应用配置，具备 Git 风格版本控制以及同步的内存内本地开关求值。最多 5 名团队成员免费，特性开关与 A/B 测试不限量。

Statsig↗

A robust platform for feature management, A/B testing, analytics, and more. Its generous free plan offers unlimited seats, flags, experiments, and dynamic configurations, supporting up to 1 million events per month.稳健的功能管理、A/B 测试与分析平台。慷慨的免费计划提供无限席位、开关、实验与动态配置，每月最多支撑 100 万条事件。

Toggled.dev↗

Enterprise-ready, scalable multi-regional feature toggles management platform. Free plan up to 10 flags, two environments, unlimited requests. SDK, analytics dashboard, release calendar, Slack notifications, and all other features are included in the endless free plan.企业级、可扩展的多区域特性开关管理平台。免费计划最多 10 个开关、2 个环境、不限请求。SDK、分析仪表盘、发布日历、Slack 通知与所有其他功能都包含在永久免费计划中。

26Font字体11▾

Befonts↗

Provides several unique fonts for personal or commercial use.提供多款用于个人或商业用途的独特字体。

Bunny↗

Privacy oriented Google Fonts注重隐私的 Google Fonts

dafont↗

The fonts presented on this website are their authors’ property and are either freeware, shareware, demo versions, or public domain.本网站展示的字体归其作者所有，分为免费软件、共享软件、演示版或公有领域。

Everything Fonts↗

Offers multiple tools; @font-face, Units Converter, Font Hinter and Font Submitter.提供多种工具：@font-face、单位换算、字体 Hinting 与字体提交。

Font of web↗

Identify all the fonts used on a website and how they are used.识别网站使用的所有字体及其用法。

Font Squirrel↗

Freeware fonts licensed for commercial work. Hand-selected these typefaces and presented them in an easy-to-use format.可用于商业用途的免费字体。这些字体经人工挑选，并以易用的格式呈现。

FontGet↗

Has a variety of fonts available to download and sorted neatly with tags.提供多种可下载字体，并用标签整齐分类。

fonts.xz.style↗

free and open source service for delivering font families to websites using CSS.免费开源的服务，通过 CSS 向网站投递字体族。

Fontsensei↗

Opensourced Google fonts tagged by users. With CJK (Chinese,Japanese, Korean) font tags.由用户标注的开源 Google 字体。含 CJK（中文、日文、韩文）字体标签。

Fontshare↗

is a free fonts service. It’s a growing collection of professional-grade fonts, 100% free for personal and commercial use.是一项免费字体服务。它不断收录专业级字体，个人与商业使用均 100% 免费。

Google Fonts↗

Many free fonts are easy and quick to install on a website via a download or a link to Google’s CDN.许多免费字体可通过下载或链接到 Google CDN 快速轻松地安装到网站上。

27Forms表单35▾

FabForm↗

Form backend platform for intelligent developers. The free plan allows 250 form submissions per month. Friendly modern GUI. Integrates with Google Sheets, Airtable, Slack, Email, and others.面向聪明开发者的表单后端平台。免费计划每月 250 条表单提交。友好的现代 GUI。可与 Google Sheets、Airtable、Slack、Email 等集成。

Feathery↗

Powerful, developer-friendly form builder. Build signup & login, user onboarding, payment flows, complex financial applications, and more. The free plan allows up to 250 submissions/month and five active forms.强大且对开发者友好的表单构建器。可构建注册与登录、用户引导、支付流程、复杂金融应用等。免费计划每月最多 250 条提交与 5 个活跃表单。

feedback.fish↗

Free plan allows collecting 25 total feedback submissions. Easy to integrate with React and Vue components provided.免费计划可收集共 25 条反馈。提供便于集成的 React 与 Vue 组件。

FluidForms↗

Form builder and backend with AI-driven logic. Free plan includes 100 responses per month, unlimited forms (including AI-created forms), webhooks, and embedding.具备 AI 驱动逻辑的表单构建器与后端。免费计划含每月 100 条回复、不限表单（含 AI 创建的表单）、Webhook 与嵌入。

Form.taxi↗

Endpoint for HTML forms submissions. With notifications, spam blockers, and GDPR-compliant data processing. Free plan for basic usage.用于 HTML 表单提交的端点。具备通知、垃圾拦截与符合 GDPR 的数据处理。基础使用免费。

Formboost.app↗

Developer-first form backend with simple HTTP endpoints, 500 free submissions/month, spam protection, email notifications, and built-in Slack, Discord & Telegram integrations. No backend required.开发者优先的表单后端，提供简单 HTTP 端点、每月 500 次免费提交、垃圾防护、邮件通知，并内置 Slack、Discord 与 Telegram 集成。无需后端。

Formcarry.com↗

HTTP POST Form endpoint, Free plan allows 100 monthly submissions.HTTP POST 表单端点，免费计划每月 100 条提交。

Formester.com↗

Share and embed unique-looking forms on your website-no limits on the number of forms created or features restricted by the plan. Get up to 100 submissions every month for free.在网站上分享并嵌入外观独特的表单——创建的表单数量不受限，功能也不因套餐而被削减。每月最多 100 条提交免费。

Forminit↗

Headless form backend for developers. The free plan allows 100 form submissions per month including file uploads, server-side field validation, email notifications, spam protection and Zapier.面向开发者的无头表单后端。免费计划每月允许 100 条表单提交，含文件上传、服务端字段校验、邮件通知、垃圾防护与 Zapier。

FormKeep.com↗

Unlimited forms with 50 monthly submissions, spam protection, email notification, and a drag-and-drop designer that can export HTML. Additional features include custom field rules, teams, and integrations to Google Sheets, Slack, ActiveCampaign, and Zapier.表单数量不限，每月 50 次提交，含垃圾信息防护、邮件通知与可导出 HTML 的拖拽式设计器。附加功能包括自定义字段规则、团队，以及与 Google Sheets、Slack、ActiveCampaign、Zapier 的集成。

Form Plume↗

Form Plume is a form backend for HTML and JavaScript forms. One endpoint gets you spam filtering, email notifications, file uploads, webhooks, and a clean inbox. Free for 500 submissions/mo.Form Plume 是面向 HTML 与 JavaScript 表单的表单后端。一个端点即可获得垃圾过滤、邮件通知、文件上传、Webhook 与干净的收件箱。每月 500 条提交免费。

formlets.com↗

Online forms, unlimited single page forms/month, 100 submissions/month, email notifications.在线表单，每月不限单页表单数、每月 100 条提交与邮件通知。

forms.app↗

Create online forms with powerful features like conditional logic, automatic score calculator, and AI. Collect up to 100 responses with a free plan, embed your forms on a website, or use them with a link.创建具备条件逻辑、自动评分器与 AI 等强大功能的在线表单。免费计划可收集最多 100 条回复，可将表单嵌入网站或通过链接使用。

formspark.io↗

Form to Email service, free plan allows unlimited forms, 250 submissions per month, support by Customer assistance team.表单转邮件服务。免费计划支持不限表单、每月 250 条提交，并提供客服团队支持。

Formspree.io↗

Send email using an HTTP POST request. The free tier limits to 50 submissions per form per month.通过 HTTP POST 请求发送邮件。免费套餐每月每个表单限 50 次提交。

Formsubmit.co↗

Easy form endpoints for your HTML forms. Free Forever. No registration is required.为你的 HTML 表单提供简单的表单端点。永久免费，无需注册。

Formware.io↗

Create fully-responsive and captivating forms in seconds, without knowing how to code, and collect unlimited responses for free!几秒内创建完全响应式且吸引人的表单，无需懂代码，并可免费收集不限量回复。

HeroTofu.com↗

Forms backend with bot detection and encrypted archive. Forward submissions via UI to email, Slack, or Zapier. Use your own front end. No server code is required. The free plan gives unlimited forms and 100 submissions per month.带机器人检测与加密归档的表单后端。可通过界面把提交转发到邮件、Slack 或 Zapier。使用你自己的前端，无需服务端代码。免费计划提供不限表单与每月 100 条提交。

HeyForm.net↗

Drag and drop online form builder. The free tier lets you create unlimited forms and collect unlimited submissions. Comes with pre-built templates, anti-spam, and 100MB file storage.拖拽式在线表单构建器。免费套餐可创建无限表单并收集无限提交。自带预置模板、反垃圾与 100 MB 文件存储。

Jotform.com↗

Create online forms for free, collect submissions, accept payments, automate workflows, and get documents signed with built-in e-signatures. Free plan includes 5 forms, 100 monthly submissions, 10 e-sign documents, 10 payment submissions, and more.免费创建在线表单、收集提交、收款、自动化流程，并用内置电子签名完成文档签署。免费计划含 5 个表单、每月 100 条提交、10 份电子签文档、10 笔支付提交等。

Kwes.io↗

Feature rich form endpoint. Works great with static sites. The free plan includes up to 1 website with up to 50 monthly submissions.功能丰富的表单端点。与静态站点配合极佳。免费计划含 1 个网站与每月最多 50 条提交。

Lucid Forms↗

Form endpoint for websites. Add working contact forms to any HTML, JS framework, or no-code site without building a backend. Free plan includes 250 submissions/month, email notifications, smart spam filtering, and Google Sheets integration.面向网站的表单端点。可为任意 HTML、JS 框架或无代码站点加上可用的联系表单，无需自建后端。免费计划含每月 250 条提交、邮件通知、智能垃圾过滤与 Google Sheets 集成。

Makeform↗

Chat-based form builder. The free form builder with unlimited forms and submissions. 99% of the features are free, includes adding logos, conditional logic, file uploads, payments, integrations, and webhooks. Pro Plan ($19/month) enables remove the Makeform Branding, custom domains and team features. Business plan ($59/month) enables RBAC, email verification and single sign on (SSO).基于聊天的表单构建器。免费表单构建器提供无限表单与提交。99% 的功能免费，包括添加 Logo、条件逻辑、文件上传、支付、集成与 Webhook。Pro 计划（每月 19 美元）可去除 Makeform 品牌、支持自定义域名与团队功能。商业计划（每月 59 美元）提供 RBAC、邮箱验证与单点登录（SSO）。

Pageclip↗

The free plan allows one site, one form, and 1,000 monthly submissions.免费方案允许 1 个站点、1 个表单，每月 1,000 次提交。

SimplePDF.eu↗

Embed a PDF editor on your website and turn any PDF into a fillable form. The free plan allows unlimited PDFs with three submissions per PDF.在你的网站上嵌入 PDF 编辑器，把任意 PDF 变成可填写表单。免费计划支持不限 PDF，每份 PDF 可提交 3 次。

smartforms.dev↗

Powerful and easy form backend for your website, forever free plan allows 50 submissions per month, 250MB file storage, Zapier integration, CSV/JSON export, custom redirect, custom response page, Telegram & Slack bot, single email notifications.面向网站的强大多功能表单后端，永久免费计划每月允许 50 条提交、250 MB 文件存储、Zapier 集成、CSV 与 JSON 导出、自定义跳转、自定义响应页、Telegram 与 Slack 机器人以及单封邮件通知。

staticforms.xyz↗

Integrate HTML forms easily without any server-side code for free. After the user submits the form, an email with the form content will be sent to your registered address.免费轻松集成 HTML 表单，无需任何服务端代码。用户提交表单后，包含表单内容的邮件会发送到你注册的地址。

Survicate↗

Pull feedback from all sources and send follow-up surveys with one tool. Automatically analyze feedback and extract insights with AI. Free email, website, in-product or mobile surveys, AI survey creator, and 25 monthly responses.用一款工具汇集所有渠道的反馈并发送跟进问卷。借助 AI 自动分析反馈并提取洞察。免费提供邮件、网站、产品内或移动端问卷、AI 问卷创建器与每月 25 条回复。

Tally.so↗

99% of all the features are free. The free tier lets you have: unlimited forms, unlimited submissions, email notifications, form logic, collect payments, file upload, custom thank you page, and many more.99% 的功能免费。免费套餐可享无限表单、无限提交、邮件通知、表单逻辑、收款、文件上传、自定义感谢页等。

Typeform.com↗

Include beautifully designed forms on websites. The free plan allows only ten fields per form and 100 monthly responses.在网站上嵌入精心设计的表单。免费计划每个表单仅限 10 个字段与每月 100 条回复。

Vidhook↗

Collect feedback using delightful surveys with high response rates. Free plan includes 1 active survey, 25 responses per survey and customizable templates.用高回复率的精美问卷收集反馈。免费计划含 1 份活跃问卷、每份问卷 25 条回复与可定制模板。

WaiverStevie.com↗

Electronic Signature platform with a REST API. You can receive notifications with webhooks. Free plan watermarks signed documents but allow unlimited envelopes + signatures.带 REST API 的电子签名平台。可通过 Webhook 接收通知。免费计划会为签署文档加水印，但不限信封数与签名数。

Web3Forms↗

Contact forms for Static & JAMStack Websites without writing backend code. The free plan allows Unlimited Forms, Unlimited Domains & 250 Submissions per month.为静态与 JAMStack 网站提供联系表单，无需编写后端代码。免费计划支持不限表单、不限域名与每月 250 条提交。

Wufoo↗

Quick forms to use on websites. The free plan has a limit of 100 submissions each month.用于网站的快速表单。免费计划每月限 100 条提交。

FormNX↗

Create unlimited forms get unlimited submissions free of cost. Use professionally created 1000+ form templates or create forms from scratch. Get features like email notifications, form logic, collect payments, file upload, custom thank you page, and many more.免费创建无限表单并收集无限提交。可使用 1,000 多个专业模板或从零创建表单。具备邮件通知、表单逻辑、收款、文件上传、自定义感谢页等功能。

28Generative AI生成式 AI22▾

Arize AX↗

AI observability and evaluation platform that helps teams understand, evaluate, and continuously improve AI agents and applications. Free plan includes unlimited users and evals, 25k spans and 1GB ingestion per month, 15-day retention, and Signal (10 issues per month). No credit card required. Self-hosting open-source option with Arize Phoenix.AI 可观测性与评估平台，帮助团队理解、评估并持续改进 AI 智能体与应用。免费计划含不限用户与评估、每月 2.5 万 span 与 1 GB 写入量、数据保留 15 天，以及 Signal（每月 10 个问题）。无需信用卡。另有基于 Arize Phoenix 的开源自托管方案。

Audio Enhancer↗

AI-powered audio enhancer SaaS that removes noise and echo while preserving natural vocal clarity. totally Free: unlimited one-click enhancements, no login required, supports MP3/WAV/FLACAI 音频增强 SaaS，在去除噪声与回声的同时保持人声自然清晰。完全免费：一键增强不限次数、无需登录，支持 MP3/WAV/FLAC

Braintrust↗

Evals, prompt playground, and data management for Gen AI. Free plan gives upto 1,000 private eval rows/week.面向生成式 AI 的评估、提示词演练场与数据管理。免费计划每周最多 1,000 行私有评估数据。

Clair↗

Clinical AI Reference. Students have free access to the professional tool suite, which includes Open Search, Clinical Summary, Med Review, Drug Interactions, ICD-10 Codes, and Stewardship. Additionally, a free trial for the professional suite is available.临床 AI 参考工具。学生可免费使用专业工具套件，含 Open Search、Clinical Summary、Med Review、Drug Interactions、ICD-10 Codes 与 Stewardship。此外还提供专业套件的免费试用。

Comet Opik↗

Evaluate, test, and ship LLM applications across your dev and production lifecycles. #opensource在开发与生产全生命周期中评估、测试并发布 LLM 应用。#opensource

Future AGI↗

Open-source platform to evaluate, observe, and improve LLM and AI agent apps, with tracing, evals, simulations, and guardrails. Free tier includes 50GB storage, 2K eval credits, 100K AI-gateway requests/month, 1M tokens of text agent simulation and 60 min of voice simulation, plus unlimited projects/seats and BYOK LLM-as-judge at $0 platform cost. #opensource开源平台，用于评估、观测并改进 LLM 与 AI 智能体应用，具备追踪、评估、模拟与护栏能力。免费套餐含 50 GB 存储、2,000 评估额度、每月 10 万次 AI 网关请求、100 万 token 的文本智能体模拟与 60 分钟语音模拟，另有不限项目与席位，并可按零平台成本自带密钥使用 LLM 作为评审模型。#opensource

Gonka Broker↗

OpenAI-compatible API for open-source models served over the decentralized Gonka.ai GPU network. 1M+ free tokens monthly. Easy integration with many AI tools.兼容 OpenAI 的 API，服务部署在去中心化 Gonka.ai GPU 网络上的开源模型。每月 100 万以上免费 token。易于集成到许多 AI 工具中。

Keywords AI↗

The best LLM monitoring platform. One format to call 200+ LLMs with 2 lines of code. 10,000 free requests every month and $0 for platform features!最好的 LLM 监控平台。用一种格式、两行代码即可调用 200+ 个 LLM。每月 10,000 次免费请求，平台功能完全免费！

Langfuse↗

Open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications. Free forever plan includes 50k observations per month and all platform features. #opensource开源 LLM 工程平台，帮助团队协作调试、分析并迭代 LLM 应用。永久免费计划含每月 5 万条观测与全部平台功能。#opensource

LangWatch↗

A LLMOps platform helping AI teams measure, monitor, and optimize LLM applications for reliability, cost-efficiency, and performance. With a powerful DSPy component, we enable seamless collaboration between engineers and non-technical teams to fine-tune and productionize GenAI products. Free plan includes all platform features, 1k traces/month and 1 workflow DSPy optimizers. #opensource帮助 AI 团队衡量、监控并优化 LLM 应用的 LLMOps 平台，关注可靠性、成本效率与性能。借助强大的 DSPy 组件，让工程师与非技术团队无缝协作，微调并落地 GenAI 产品。免费计划包含全部平台功能、每月 1,000 条 trace 与 1 个工作流 DSPy 优化器。#opensource

Latitude↗

Open-source (MIT) LLM observability and evaluation platform to trace, monitor, and evaluate AI agents in production. Free Starter plan includes 20K credits/month, 30-day data retention, and unlimited seats. #opensource开源（MIT）的 LLM 可观测与评估平台，用于跟踪、监控并评估生产环境中的 AI 智能体。免费 Starter 计划含每月 2 万额度、30 天数据保留与不限席位。#opensource

Lumenfall.ai↗

AI media gateway providing unified access to leading image generation models via an OpenAI-compatible API. The platform itself is free to use with zero markup and no subscription fee. Inference costs for most models are billed at provider price, but FLUX.1 [schnell] FP8 is offered free forever with unlimited usage for registered users. Built-in failover and provider resilience included.AI 媒体网关，通过兼容 OpenAI 的 API 统一访问主流图像生成模型。平台本身免费使用，不加价、不收订阅费。多数模型的推理成本按供应商价格计费，但 FLUX.1 [schnell] FP8 对注册用户永久免费且不限量。内置故障转移与供应商容灾。

Maxim↗

An LLM evaluation and observability platform with agent simulation and prompt playground. Free tier offers 10k monthly logs, access to prompt playground, simulations and evaluations via BYOK.具备智能体模拟与提示词演练场的 LLM 评估与可观测平台。免费套餐含每月 1 万条日志，并可通过自带密钥使用提示词演练场、模拟与评估。

Mediaworkbench.ai↗

MediaWorkbench.ai offers 100,000 free words for Azure OpenAI, DeepSeek, and Google Gemini models, enabling users to access powerful tools for code generation, deep research, and image creation.MediaWorkbench.ai 为 Azure OpenAI、DeepSeek 与 Google Gemini 模型提供 100,000 个免费词，让用户使用代码生成、深度研究与图像创作等强大工具。

onomeo↗

Onomeo gives you one key for dozens of AI models. Plug it right into tools like Cline, SillyTavern, or Open WebUI using standard OpenAI format. 35 models are completely free (60 requests / 5 hrs per user, pooled at 450 / 5 hrs across all users). Daily check-in credits let you use big models like Claude and GPT, up to a daily limit. Extra credits start at $5/month. We’re in open beta, so expect occasional instability. It’s great for casual use, but not ready to be a daily driver. Feedback is always welcome.Onomeo 用一个密钥接入数十个 AI 模型。可按标准 OpenAI 格式直接接入 Cline、SillyTavern 或 Open WebUI 等工具。35 个模型完全免费（每用户每 5 小时 60 次请求，所有用户合计每 5 小时 450 次）。每日签到额度可用 Claude、GPT 等大模型，有每日上限。额外额度每月 5 美元起。目前处于公开测试期，可能偶有波动。适合偶尔使用，尚不适合作为主力。欢迎反馈。

OpenRouter↗

Provides various free AI models including DeepSeek R1, V3, Llama, and Moonshot AI. These models excel in natural language processing and are suitable for diverse development needs. Note that while these models are free to use, they are subject to rate limits. Additionally, OpenRouter offers paid models for more advanced requirements, for instance Claude, OpenAI, Grok, Gemini, and Nova.提供多种免费 AI 模型，包括 DeepSeek R1、V3、Llama 与 Moonshot AI。这些模型在自然语言处理上表现出色，适合多样化开发需求。注意这些模型虽可免费使用，但受速率限制。此外 OpenRouter 也提供付费模型以满足更高级需求，例如 Claude、OpenAI、Grok、Gemini 与 Nova。

Pollinations.AI↗

easy-to-use, free image generation AI with free API available. No signups or API keys required, and several option for integrating into a website or workflow. #opensource易于使用的免费图像生成 AI，并提供免费 API。无需注册或 API key，有多种方式可集成到网站或工作流中。#opensource

Portkey↗

Control panel for Gen AI apps featuring an observability suite & an AI gateway. Send & log up to 10,000 requests for free every month.面向生成式 AI 应用的控制面板，内含可观测套件与 AI 网关。每月免费发送并记录最多 10,000 次请求。

ReportGPT↗

AI Powered Writing Assistant. The entire platform is free as long as you bring your own API key.AI 写作助手。只要自带 API 密钥，整个平台免费。

telemetry.dev↗

Observability for AI/LLM apps built on OpenTelemetry. Traces model calls and tool steps with tokens, cost, latency and errors; send OTLP over HTTP from any language or use the TypeScript SDKs. Free plan includes 10,000 spans/month, 7-day retention, 1 project and 2 seats, no credit card.基于 OpenTelemetry 的 AI 与 LLM 应用可观测能力。跟踪模型调用与工具步骤的 token、成本、延迟与错误；可从任意语言通过 HTTP 发送 OTLP，或使用 TypeScript SDK。免费计划含每月 10,000 span、保留 7 天、1 个项目与 2 个席位，无需信用卡。

Transcript LOL↗

Converts audio or video to text using AI. Generates summaries and other insights using LLMs. The free tier includes 2 transcriptions per day. You can upload files, record voice notes, or use links from YouTube, Instagram etc. The free version also supports WhatsApp, Telegram and importing files directly from cloud storages – Google Drive, Dropbox, Box and OneDrive. No API key needed. Sign up and ready to use. Also has apps for mobiles, desktops and chromebooks.使用 AI 把音频或视频转成文本，并用 LLM 生成摘要与其他洞察。免费套餐每天 2 次转写。可上传文件、录制语音备忘，或使用 YouTube、Instagram 等链接。免费版还支持 WhatsApp、Telegram，并可直接从 Google Drive、Dropbox、Box 与 OneDrive 导入文件。无需 API 密钥，注册即可使用。另有移动端、桌面与 Chromebook 应用。

Zenable↗

Instantly auto-fix outputs from tools like Cursor, Windsurf, and Copilot to meet your company’s quality and compliance standards using guardrails built with Policy as Code. The free tier includes 100 tools calls per day to the MCP server and 25 free automated pull request reviews per day via the GitHub App.使用以 Policy as Code 构建的护栏，自动修复 Cursor、Windsurf 与 Copilot 等工具的输出，使其符合公司的质量与合规标准。免费套餐含每天 100 次对 MCP server 的工具调用，以及通过 GitHub App 每天 25 次免费自动化 PR 评审。

29CDN and ProtectionCDN 与安全防护17▾

bootstrapcdn.com↗

CDN for bootstrap, bootswatch and fontawesome.iobootstrap、bootswatch 与 fontawesome.io 的 CDN

CacheFly↗

Up to 5 TB per month of Free CDN traffic, 19 Core PoPs , 1 Domain and Universal SSL.每月最多 5 TB 免费 CDN 流量，19 个核心 PoP 节点，1 个域名与通用 SSL。

cdnjs.com↗

Simple. Fast. Reliable. Content delivery at its finest. cdnjs is a free and open-source CDN service trusted by over 11% of all websites, powered by Cloudflare.简单、快速、可靠。最出色的内容分发。cdnjs 是免费开源的 CDN 服务，被全部网站中超过 11% 使用，并由 Cloudflare 提供支持。

developers.google.com↗

The Google Hosted Libraries is a content distribution network for the most popular Open Source JavaScript librariesGoogle Hosted Libraries 是面向最流行开源 JavaScript 库的内容分发网络。

Gcore↗

Global content delivery network, 1 TB and 1 million requests per month free and全球内容分发网络，每月免费 1 TB 与 100 万次请求

jsdelivr.com↗

A free, fast, and reliable open-source CDN. Supports npm, GitHub, WordPress, Deno, and more.免费、快速且可靠的开源 CDN。支持 npm、GitHub、WordPress、Deno 等。

Microsoft Ajax↗

The Microsoft Ajax CDN hosts popular third-party JavaScript libraries such as jQuery and enables you to easily add them to your Web applicationMicrosoft Ajax CDN 托管 jQuery 等流行第三方 JavaScript 库，方便你将其加入自己的 Web 应用。

Namecheap Supersonic↗

Free DDoS protection免费 DDoS 防护

ovh.ie↗

Free DDoS protection and SSL certificate免费 DDoS 防护与 SSL 证书

PromoProxy↗

Free cloud Secure Web Gateway. Free plan includes up to 5 users and 1 GB per day.免费的云端安全 Web 网关。免费计划含最多 5 名用户与每天 1 GB。

raw.githack.com↗

A modern replacement of **rawgit.com** which simply hosts file using Cloudflare**rawgit.com** 的现代替代品，仅使用 Cloudflare 托管文件

Skypack↗

The 100% Native ES Module JavaScript CDN. Free for 1 million requests per domain per month.100% 原生 ES Module 的 JavaScript CDN。每个域名每月 100 万次请求免费。

statically.io↗

CDN for Git repos (GitHub, GitLab, Bitbucket), WordPress-related assets, and images面向 Git 仓库（GitHub、GitLab、Bitbucket）、WordPress 相关资源与图片的 CDN

Stellate↗

Stellate is a blazing-fast, reliable CDN for your GraphQL API and free for two services.Stellate 是为你的 GraphQL API 提供极速、可靠 CDN 的服务，2 个服务免费。

toranproxy.com↗

Proxy for Packagist and GitHub. Never fail CD. Free for personal use, one developer, no supportPackagist 与 GitHub 的代理。让 CI 永不失败。个人使用、1 名开发者免费，不含支持

UNPKG↗

CDN for everything on npmnpm 上所有内容的 CDN

weserv↗

An image cache & resize service. Manipulate images on the fly with a worldwide cache.图片缓存与尺寸调整服务。可借助全球缓存实时处理图片。

30PaaSPaaS 平台即服务25▾

ampt.dev↗

Ampt lets teams build, deploy, and scale JavaScript apps on AWS without complicated configs or managing infrastructure. Free Preview plan includes 500 invocations hourly, 2,500 invocations daily and 50,000 invocations monthly. Custom domains are allowed only in the paid plans.Ampt 让团队无需复杂配置或管理基础设施即可在 AWS 上构建、部署与扩展 JavaScript 应用。免费预览计划含每小时 500 次、每天 2,500 次、每月 50,000 次调用。自定义域名仅在付费计划中支持。

anvil.works↗

Web app development with nothing but Python. Free tier with unlimited apps and 30-second timeouts.仅用 Python 即可开发 Web 应用。免费档应用数量不限，超时上限 30 秒。

Apply.build↗

Build and deploy your GitHub app for free with 0.5 vCPUs / 512 MiB RAM, European servers, automatic firewall, real-time performance metrics. Run Node.js, Python, Go, Java, static sites, microservices, and more.免费构建并部署你的 GitHub 应用，配 0.5 vCPU 与 512 MiB 内存、欧洲服务器、自动防火墙与实时性能指标。可运行 Node.js、Python、Go、Java、静态站点、微服务等。

appwrite↗

Unlimited projects with no project pausing (supports websockets) and authentication service. 1 Database, 3 Buckets, 5 Functions per project in free tier.项目数量不限且不会暂停（支持 websocket），并提供身份认证服务。免费档中每个项目含 1 个数据库、3 个 Bucket、5 个函数。

Clever Cloud↗

European PaaS with automated deployments, autoscaling, managed databases, and Git-based workflows. Includes €20 free credits at signup, a limited DEV plan with free MySQL and PostgreSQL databases, and free allowances for services like Heptapod and FS Buckets.欧洲 PaaS，具备自动化部署、自动扩缩容、托管数据库与基于 Git 的工作流。注册即赠 20 欧元额度，提供含免费 MySQL 与 PostgreSQL 数据库的受限 DEV 计划，以及 Heptapod、FS Buckets 等服务的免费额度。

Choreo↗

AI-native internal developer platform as a service. The free tier includes up to 5 components and $100 credits per month.AI 原生的内部开发者平台即服务。免费套餐含最多 5 个组件与每月 100 美元额度。

codenameone.com↗

Open source, cross-platform, mobile app development toolchain for Java/Kotlin developers. Free for commercial use with an unlimited number of projects面向 Java 与 Kotlin 开发者的开源跨平台移动应用开发工具链。商业使用免费，项目数量不限

Cohesivity↗

Headless backend and services, purpose built for AI agents. Includes hosting, databases, storage, LLMs, and third-party APIs. Agentic signup. Free tier includes 10 projects, 100K edge requests, 10 GB object storage, 100 emails, and 5 USD/month in credits for AI and search.专为 AI 智能体打造的无头后端与服务。包含托管、数据库、存储、LLM 与第三方 API，支持智能体自助注册。免费套餐含 10 个项目、10 万次边缘请求、10 GB 对象存储、100 封邮件，以及每月 5 美元用于 AI 与搜索的额度。

Daestro↗

Run compute jobs across Cloud Providers & On-Prem. The free tier includes up to 10 concurrent job runs, 2 compute spawns, self-hosted compute, 1 cloud provider, 1 container registry and 1 cron job.跨云厂商与本地运行计算任务。免费套餐含最多 10 个并发任务运行、2 个计算节点、自托管计算、1 个云厂商、1 个容器仓库与 1 个定时任务。

Deno Deploy↗

Distributed system that runs JavaScript, TypeScript, and WebAssembly at the edge worldwide. The free tier includes 100,000 requests per day and 100 GiB data transfers per month.在全球边缘运行 JavaScript、TypeScript 与 WebAssembly 的分布式系统。免费套餐含每天 10 万次请求与每月 100 GiB 数据传输。

Deplexo↗

Developer-focused PaaS for deploying and hosting applications with Git-based deployments, custom domains, automatic HTTPS, and Dockerfile support. Run Node.js, Python, Go, Java, Rust, PHP, static sites, and more. The free tier includes 1 app with 0.25 vCPU, 128 MB RAM, 250 MB disk, and 100 GB bandwidth.面向开发者的 PaaS，用基于 Git 的部署方式部署与托管应用，支持自定义域名、自动 HTTPS 与 Dockerfile。可运行 Node.js、Python、Go、Java、Rust、PHP、静态站点等。免费套餐含 1 个应用，配 0.25 vCPU、128 MB 内存、250 MB 磁盘与 100 GB 带宽。

domcloud.co↗

Linux hosting service that provides CI/CD with GitHub, SSH, and MariaDB/Postgres database. The free version has 1 GB storage and 1 GB network/month limit and is limited to a free domain.Linux 托管服务，提供与 GitHub 的 CI/CD、SSH 与 MariaDB 及 Postgres 数据库。免费版含 1 GB 存储与每月 1 GB 网络流量，且仅限使用免费域名。

encore.dev↗

Backend framework using static analysis to provide automatic infrastructure, boilerplate-free code, and more. Includes free cloud hosting for hobby projects.使用静态分析提供自动基础设施、无样板代码等的后端框架。含面向业余项目的免费云托管。

faable.com↗

Deploy apps with framework auto-detection for Python and Node.js. The free tier includes one 0.5 CPU / 1 GB RAM instance per project, 10 GB bandwidth, 10 successful deploys per day, automatic SSL and a built-in WAF, plus OAuth 2.0 / OIDC authentication. Apps sleep after 2 hours without traffic. European servers.部署应用并自动识别 Python 与 Node.js 框架。免费套餐含每个项目 1 个 0.5 CPU / 1 GB 内存实例、10 GB 带宽、每天 10 次成功部署、自动 SSL 与内置 WAF，以及 OAuth 2.0 / OIDC 认证。应用无流量 2 小时后休眠。欧洲服务器。

flightcontrol.dev↗

Deploy web services, databases, and more on your own AWS account with a Git push style workflow. Free tier for users with 1 developer on personal GitHub repos. AWS costs are billed through AWS, but you can use credits and the AWS free tier.用类似 Git push 的工作流在自己的 AWS 账号上部署 Web 服务、数据库等。面向个人 GitHub 仓库开发者的免费套餐含 1 名开发者。AWS 费用通过 AWS 结算，但可使用额度与 AWS 免费套餐。

gigalixir.com↗

Gigalixir provides one free instance that never sleeps and a free-tier PostgreSQL database limited to 2 connections, 10, 000 rows and no backups for Elixir/Phoenix apps.Gigalixir 为 Elixir/Phoenix 应用提供一个永不休眠的免费实例，以及一个限 2 个连接、1 万行且无备份的免费套餐 PostgreSQL 数据库。

Northflank↗

Build and deploy microservices, jobs, and managed databases with a powerful UI, API & CLI. Seamlessly scale containers from version control and external Docker registries. The free tier includes two services, two cron jobs and 1 database.通过强大的 UI、API 与 CLI 构建和部署微服务、任务与托管数据库。可从版本控制与外部 Docker 仓库无缝扩展容器。免费套餐含 2 个服务、2 个定时任务与 1 个数据库。

Ownkube↗

Free single-node k3s in your own AWS account, run apps, databases, workers with a git push. Use your AWS credits at peak efficiency.在你自己的 AWS 账号中免费运行单节点 k3s，用 git push 即可运行应用、数据库与 worker。以最高效率使用你的 AWS 额度。

pipedream.com↗

An integration platform built for developers. Develop any workflow based on any trigger. Workflows are code you can run for free. No server or cloud resources to manage.为开发者打造的集成平台。基于任意触发器开发任意工作流。工作流即代码，可免费运行。无需管理服务器或云资源。

pythonanywhere.com↗

Cloud Python app hosting. Beginner account is free, 1 Python web application at your-username.pythonanywhere.com domain, 512 MB private file storage, one MySQL database云端 Python 应用托管。新手账号免费，可在 your-username.pythonanywhere.com 域名下运行 1 个 Python Web 应用，512 MB 私有文件存储与 1 个 MySQL 数据库

Runsite↗

European PaaS with automated deployments from GitHub for web services or static sites (1 web 0.1 vCPU/256 MB free), managed PostgreSQL and Valkey(Redis) (30 days for free), Transactional Email (3,000 emails/month free), S3 compatible storage (5 GB/free), all what you need for start your web site. Servers located in Germany.欧洲 PaaS，支持从 GitHub 自动化部署 Web 服务或静态站点（免费 1 个 Web 应用，0.1 vCPU / 256 MB）、托管 PostgreSQL 与 Valkey（Redis）（免费 30 天）、事务邮件（每月免费 3,000 封）、兼容 S3 的存储（免费 5 GB），搭建网站所需一应俱全。服务器位于德国。

SnapDeploy↗

Docker containers or GitHub repos, hosted on AWS. Free tier: up to 4 containers, 100 running hours a month, 10 deploys a day. Sleeps after 15 minutes idle and wakes on the next request. No credit card.Docker 容器或 GitHub 仓库，托管在 AWS 上。免费套餐：最多 4 个容器、每月 100 运行小时、每天 10 次部署。空闲 15 分钟后休眠，下次请求时唤醒。无需信用卡。

Val Town↗

Collaborative TypeScript/JavaScript serverless platform for scripts, HTTP endpoints, and cron jobs. Free plan includes unlimited public vals, 15-minute cron intervals, 1-minute wall-clock time per run, and 3-day log retention. No custom domains on free.协作式 TypeScript/JavaScript 无服务器平台，面向脚本、HTTP 端点与定时任务。免费计划含不限公开 val、15 分钟定时间隔、单次运行 1 分钟墙钟时间与 3 天日志保留。免费版不支持自定义域名。

WunderGraph↗

An open-source platform that allows you to quickly build, ship and manage modern APIs. Built-in CI/CD, GitHub integration, and automatic HTTPS. Up to 3 projects, 1GB egress, 300 minutes of build time per month on the free plan开源平台，可快速构建、发布与管理现代 API。内置 CI/CD、GitHub 集成与自动 HTTPS。免费计划含最多 3 个项目、1 GB 出网流量与每月 300 分钟构建时长

YepCode↗

All-in-one platform to connect APIs and services in a serverless environment. It brings all the agility and benefits of NoCode tools but with all the power of using programming languages. The free tier includes 1.000 yeps.在无服务器环境中连接 API 与服务的一体化平台。它兼具 NoCode 工具的敏捷性，同时具备使用编程语言的完整能力。免费套餐含 1,000 次 yep 调用。

31BaaSBaaS 后端即服务21▾

Activepieces↗

Build automation flows to connect several apps together in your app’s backend. For example, send a Slack message or add a Google Sheet row when an event fires in your app. Free up to 5,000 tasks per month.在应用后端构建自动化流程以连接多个应用。例如当应用中触发某事件时发送 Slack 消息或添加一行 Google Sheet。每月最多 5,000 个任务免费。

back4app.com↗

Back4App is an easy-to-use, flexible and scalable backend based on Parse Platform.Back4App 是基于 Parse Platform 的易用、灵活且可扩展的后端。

backendless.com↗

Mobile and Web Baas, with 1 GB file storage free, push notifications of 50,000/month, and 1000 data objects in the table.移动端与 Web 的 BaaS，免费 1 GB 文件存储、每月 5 万条推送通知与表中 1,000 个数据对象。

connectycube.com↗

Unlimited chat messages, p2p voice & video calls, files attachments and push notifications. Free for apps up to 1000 users.聊天消息、点对点语音与视频通话、文件附件与推送通知均不限量。应用用户数不超过 1000 时免费。

convex.dev↗

Reactive backend as a service, hosting your data (documents with relationships & serializable ACID transactions), serverless functions, and WebSockets to stream updates to various clients. Free for small projects – up to 1M records, 5M monthly function calls.响应式后端即服务，托管你的数据（带关系的文档与可序列化的 ACID 事务）、无服务器函数，并通过 WebSocket 向各类客户端推送更新。小型项目免费——最多 100 万条记录与每月 500 万次函数调用。

ETLR↗

Define, version, and deploy automation scripts using YAML. A developer-first alternative to drag-and-drop tools. Can be used for scheduled tasks, AI agents, and infrastructure monitoring. Free tier includes 100 credits/month.用 YAML 定义、版本化并部署自动化脚本。拖拽式工具的开发者优先替代品。可用于定时任务、AI 智能体与基础设施监控。免费套餐每月 100 额度。

Flutter Flow↗

Build your Flutter App UI without writing a single line of code. Also has a Firebase integration. The free plan includes full access to UI Builder and Free templates.不写一行代码即可构建 Flutter 应用 UI，并集成 Firebase。免费计划含 UI Builder 完整访问与免费模板。

getstream.io↗

Build scalable In-App Chat, Messaging, Video and audio, and Feeds in a few hours instead of weeks用几小时而非几周构建可扩展的应用内聊天、消息、音视频与 Feeds

IFTTT↗

Automate your favorite apps and devices. Free 2 Applets自动化你常用的应用与设备。免费 2 个 Applet

Integrately↗

Automate tedious tasks with a single click. Free 100 Tasks, 15 Minute一键自动化枯燥任务。免费 100 个任务、15 分钟

LeanCloud↗

Mobile backend. 1GB of data storage, 256MB instance, 3K API requests/day, and 10K pushes/day are free. (API is very similar to Parse Platform)移动后端。免费 1 GB 数据存储、256 MB 实例、每天 3,000 次 API 请求与每天 1 万次推送。（API 与 Parse Platform 非常相似）

nhost.io↗

Serverless backend for web and mobile apps. The free plan includes PostgreSQL, GraphQL (Hasura), Authentication, Storage, and Serverless Functions.面向 Web 与移动应用的无服务器后端。免费计划含 PostgreSQL、GraphQL（Hasura）、认证、存储与无服务器函数。

onesignal.com↗

Unlimited free push notifications. 10,000 email sends per month, with unlimited contacts and access to Auto Warm Up.推送通知不限量免费。每月 10,000 封邮件发送额度，联系人不限量并可使用自动预热（Auto Warm Up）。

paraio.com↗

Backend service API with flexible authentication, full-text search and caching. Free for one app, 1GB of app data.具备灵活认证、全文搜索与缓存的后端服务 API。1 个应用免费，1 GB 应用数据。

pubnub.com↗

Free push notifications for up to 1 million messages/month and 100 active daily devices免费推送通知，每月最多 100 万条消息与 100 台日活设备

pusher.com↗

Free, unlimited push notifications for 2000 monthly active users. A single API for iOS and Android devices.面向 2,000 名月活用户的免费不限量推送通知。iOS 与 Android 设备共用一个 API。

simperium.com↗

Move data everywhere instantly and automatically, multi-platform, unlimited sending and storage of structured data, max. 2,500 users/month即时自动地把数据搬到任何地方，跨平台，结构化数据发送与存储不限量，每月最多 2,500 名用户

snill.ai↗

AI no-code platform that turns a plain-language description into a complete business system with a relational database, dashboards, workflows, REST API and webhooks. Free plan for solo operators includes 2 apps, 1,000 records and 10 AI requests/day.AI 无代码平台，把一段自然语言描述变成完整的业务系统，包含关系型数据库、仪表盘、工作流、REST API 与 Webhook。面向个人经营者的免费计划含 2 个应用、1,000 条记录与每天 10 次 AI 请求。

Supabase↗

The Open Source Firebase Alternative to build backends. Free Plan offers Authentication, Realtime Database & Object Storage.开源版 Firebase 替代方案，用于构建后端。免费方案提供身份认证、实时数据库与对象存储。

tyk.io↗

API management with authentication, quotas, monitoring and analytics. Free cloud offering含认证、配额、监控与分析能力的 API 管理。提供免费云版本

zapier.com↗

Connect the apps you use to automate tasks. Five zaps every 15 minutes and 100 tasks/month连接你使用的应用以自动化任务。每 15 分钟 5 个 zap，每月 100 个任务

32Low-code Platform低代码平台10▾

appsmith↗

Low code project to build admin panels, internal tools, and dashboards. Integrates with 15+ databases and any API.用于构建管理后台、内部工具与仪表盘的低代码项目。可集成 15 个以上数据库与任意 API。

BudiBase↗

Budibase is an open-source low-code platform for creating internal apps in minutes. Supports PostgreSQL, MySQL, MSSQL, MongoDB, Rest API, Docker, K8sBudibase 是开源低代码平台，几分钟内即可创建内部应用。支持 PostgreSQL、MySQL、MSSQL、MongoDB、REST API、Docker、K8s

Clappia↗

A low-code platform designed for building business process applications with customizable mobile and web apps. Offers a drag-and-drop interface, features like Offline Support, real-time location tracking and integration with various third-party services为构建业务流程应用而设计的低代码平台，可定制移动端与 Web 应用。提供拖拽式界面，具备离线支持、实时位置跟踪以及与各类第三方服务的集成。

lil’bots↗

write and run scripts online utilizing free built-in APIs like OpenAI, Anthropic, Firecrawl and others. Great for building AI agents / internal tooling and sharing with team. Free-tier includes full access to APIs, AI coding assistant and 10,000 execution credits / month.在线编写并运行脚本，可使用 OpenAI、Anthropic、Firecrawl 等免费内置 API。非常适合构建 AI 智能体 / 内部工具并与团队分享。免费档包含 API 的完整访问、AI 编程助手与每月 10,000 次执行额度。

manubes↗

Powerful no-code cloud platform with a focus on industrial production management. Free for one user with 1 million workflow activities a month (also available in german).强大的无代码云平台，聚焦工业生产管理。1 名用户免费，每月 100 万次工作流活动（也提供德文版）。

Mendix↗

Rapid Application Development for Enterprises, unlimited accessible sandbox environments supporting total users, 0.5 GB storage and 1 GB RAM per app. Also, Studio and Studio Pro IDEs are allowed in the free tier.面向企业的快速应用开发，不限数量的可访问沙箱环境并支持全部用户，每个应用 0.5 GB 存储与 1 GB 内存。免费套餐也包含 Studio 与 Studio Pro IDE。

outsystems.com↗

Enterprise web development PaaS for on-premise or cloud, free “personal environment” offering allows for unlimited code and up to 1 GB database可本地部署或上云的企业级 Web 开发 PaaS，免费的个人环境提供不限代码与最多 1 GB 数据库

ReTool↗

Low-code platform for building internal applications. Retool is highly hackable. If you can write it with JavaScript and an API, you can make it in Retool. The free tier allows up to five users per month, unlimited apps and API connections.用于构建内部应用的低代码平台。Retool 高度可编程。只要能用 JavaScript 与 API 写出来，就能在 Retool 中做出来。免费套餐每月最多 5 名用户、不限应用与 API 连接。

ToolJet↗

Extensible low-code framework for building business applications. Connect to databases, cloud storages, GraphQL, API endpoints, Airtable, etc., and build apps using drag-and-drop application builder.可扩展的低代码框架，用于构建业务应用。可连接数据库、云存储、GraphQL、API 端点、Airtable 等，并用拖拽式应用构建器搭建应用。

UI Bakery↗

Low-code platform that enables faster building of custom web applications. Supports building UI using drag and drop with a high level of customization through JavaScript, Python, and SQL. Available as both cloud and self-hosted solutions. Free for up to 5 users.可更快构建自定义 Web 应用的低代码平台。支持拖拽式 UI 构建，并可通过 JavaScript、Python 与 SQL 进行高度定制。同时提供云端与自托管方案。最多 5 名用户免费。

33Web Hosting网站托管26▾

Alwaysdata↗

1 GB free web hosting with support for MySQL, PostgreSQL, RabbitMQ, .NET, Deno, Elixir, Go, Java, Lua, Node.js, PHP, Python, Ruby, Rust. Custom web servers, access via FTP, WebDAV and SSH. Mailbox, mailing list and app installer included. No custom domain on free plan.1 GB 免费网站托管，支持 MySQL、PostgreSQL、RabbitMQ、.NET、Deno、Elixir、Go、Java、Lua、Node.js、PHP、Python、Ruby、Rust。可使用自定义 Web 服务器，支持 FTP、WebDAV 与 SSH 访问；含邮箱、邮件列表与应用安装器。免费套餐不支持绑定自有域名。

Awardspace.com↗

Free web hosting + a free short domain, PHP, MySQL, App Installer, Email Sending & No Ads.免费网站托管加免费短域名，支持 PHP、MySQL、应用安装器与邮件发送，且无广告。

boomurl↗

Publish static sites (HTML/Markdown/images/PDF or a whole folder) to an instant HTTPS URL with no account; free tier shows a small banner. Custom domains supported.把静态站点（HTML、Markdown、图片、PDF 或整个文件夹）发布到即时 HTTPS URL，无需账号；免费套餐会显示小横幅。支持自定义域名。

Bubble↗

Visual programming to build web and mobile apps without code, free with Bubble branding.无需写代码即可构建 Web 与移动应用的可视化编程工具，免费但带 Bubble 品牌标识。

dAppling Network↗

Decentralized web hosting platform for Web3 frontends focusing on increasing uptime and security and providing an additional access point for users.面向 Web3 前端的去中心化网站托管平台，聚焦提升可用率与安全性，并为用户提供额外的访问入口。

DigitalOcean↗

Build and deploy three static sites for free on the App Platform Starter tier.在 App Platform Starter 层免费构建并部署 3 个静态站点。

FreeFlarum↗

Community-powered free Flarum hosting for up to 250 users (donate to remove the watermark from the footer).社区驱动的免费 Flarum 托管，最多 250 名用户（捐赠可去除页脚水印）。

Harvis.dev↗

Static site hosting via CLI (npx harvis) with no config files or build step. Includes free subdomain, free form submissions collections, GitHub Actions integration, CloudFlare CDN, free SSL.通过 CLI（npx harvis）进行静态站点托管，无需配置文件或构建步骤。含免费子域名、免费表单提交收集、GitHub Actions 集成、CloudFlare CDN 与免费 SSL。

Koyeb↗

Serverless platform with a free Hobby plan providing 550 free compute hours/month (512 MB RAM Free tier), 1 free PostgreSQL database, and custom domain SSL.无服务器平台，免费 Hobby 计划每月提供 550 免费计算小时（免费档 512 MB 内存）、1 个免费 PostgreSQL 数据库与自定义域名 SSL。

MDB GO↗

Free hosting for one project with two weeks Container TTL, 500 MB RAM per project, SFTP – 1G disk space.1 个项目的免费托管，容器 TTL 两周，每项目 500 MB 内存，SFTP 与 1 GB 磁盘空间。

Mirin↗

Website platform for developer-built React, Vue, or Svelte component sites with visual editing, forms, analytics, and global CDN hosting. Free tier includes 1 site with unlimited pages and submissions.面向开发者构建 React、Vue 或 Svelte 组件站点的网站平台，提供可视化编辑、表单、分析与全球 CDN 托管。免费档含 1 个站点，页面与提交次数不限。

Neocities↗

Static, 1 GB free storage with 200 GB Bandwidth.静态，免费 1 GB 存储与 200 GB 带宽。

Netlify↗

Builds, deploys and hosts static site/app free for 300 credits/month (equals 30 GB bandwidth).构建、部署并托管静态站点与应用，每月免费 300 额度（相当于 30 GB 带宽）。

PandaStack↗

An eco-system for developers includes web hosting in different formats (static web hosting, container based web hosting, wordpress and so many other managed apps available in couple of clicks ). One free web hosting (static or containered) and one free database with 100GB Bandwidth and 300 Build mins/month.开发者生态，提供多种形式的网站托管（静态托管、容器托管、WordPress 等大量托管应用，几次点击即可开通）。含 1 个免费网站托管（静态或容器）与 1 个免费数据库，100 GB 带宽与每月 300 分钟构建时长。

pantheon.io↗

Drupal and WordPress hosting, automated DevOps, and scalable infrastructure. Free for developers and agencies. No custom domain.Drupal 与 WordPress 托管、自动化 DevOps 与可扩展基础设施。对开发者与代理商免费。不支持自定义域名。

Qoddi↗

PaaS service similar to Heroku with a developer-centric approach and all-inclusive features. Free tier for static assets, staging, and developer apps.类似 Heroku 的 PaaS 服务，以开发者为中心且功能一站式。为静态资源、预发环境与开发者应用提供免费套餐。

readthedocs.org↗

Free documentation hosting with versioning, PDF generation, and more免费的文档托管，支持版本管理与 PDF 生成等

render.com↗

Unified cloud to build and run apps and sites with free SSL, a global CDN, private networks, auto-deploys from Git, and completely free plans for web services, databases, and static web pages.统一云平台，提供免费 SSL、全球 CDN、私有网络、从 Git 自动部署，用于构建与运行应用和站点，并为 Web 服务、数据库与静态网页提供完全免费的方案。

Revdoku↗

Publish files, reports, custom microsites right from ChatGPT, Claude, Codex and other AI agents as public or password-protected websites. Free tier: 2GB storage, 2 live sites/apps, 1 database (25 MB), 3 AI connections, 1k files/bucket (100 MB/file), basic analytics.直接从 ChatGPT、Claude、Codex 等 AI 智能体发布文件、报告与自定义微站点，生成公开或密码保护的网站。免费套餐：2 GB 存储、2 个在线站点或应用、1 个数据库（25 MB）、3 个 AI 连接、每 bucket 1,000 个文件（单文件 100 MB）与基础分析。

ShipStatic↗

Static hosting your AI agent can drive itself: npx @shipstatic/ship ./dist and the site is live, with no install, no signup, no repo, no build. MCP, SDK and API too. Free accounts keep sites permanently with automatic HTTPS, global edge delivery and unmetered bandwidth; custom domains are paid.你的 AI 智能体可自行驱动的静态托管：npx @shipstatic/ship ./dist 即可上线，无需安装、无需注册、无需仓库、无需构建。也提供 MCP、SDK 与 API。免费账号可永久保留站点，含自动 HTTPS、全球边缘分发与不限流量带宽；自定义域名需付费。

SourceForge↗

Find, Create, and Publish Open Source software for free免费发现、创建并发布开源软件

surge.sh↗

Static web publishing for Front-End developers. Unlimited sites with custom domain support面向前端开发者的静态网页发布。站点不限量并支持自定义域名

tilda.cc↗

One site, 50 pages, 50 MB storage, only the main pre-defined blocks among 170+ available, no fonts, no favicon, and no custom domain1 个站点、50 个页面、50 MB 存储，仅可使用 170 多个可用区块中预定义的主要区块，无字体、无 favicon，也不支持自定义域名

Vercel↗

Build, deploy, and host web apps with free SSL, global CDN, and unique Preview URLs each time you git push. Perfect for Next.js and other Static Site Generators.构建、部署并托管 Web 应用，含免费 SSL、全球 CDN，且每次 git push 生成独立预览 URL。非常适合 Next.js 及其他静态站点生成器。

Versoly↗

SaaS-focused website builder – unlimited websites, 70+ blocks, five templates, custom CSS, favicon, SEO and forms. No custom domain.面向 SaaS 的网站构建器——不限网站、70 多个区块、5 个模板、自定义 CSS、favicon、SEO 与表单。不支持自定义域名。

Stormkit↗

Self-hostable Vercel alternative for building, hosting, and deploying modern frontend and JavaScript applications. Free plan includes 1 app, 50 GB bandwidth, unlimited custom domains, and free SSL.可自托管的 Vercel 替代品，用于构建、托管并部署现代前端与 JavaScript 应用。免费计划含 1 个应用、50 GB 带宽、不限自定义域名与免费 SSL。

34DNSDNS 解析22▾

1.1.1.1↗

Free public DNS Resolver, which is fast and secure (encrypt your DNS query), provided by Cloudflare. Useful to bypass your internet provider’s DNS blocking, prevent DNS query spying, and to block adult & malware content. It can also be used via API. Note: Just a DNS resolver, not a DNS hoster.由 Cloudflare 提供的免费公共 DNS 解析器，快速且安全（可加密你的 DNS 查询）。可用于绕过运营商的 DNS 屏蔽、防止 DNS 查询被窃听，以及拦截成人内容与恶意软件。也可通过 API 使用。注意：它只是 DNS 解析器，不是 DNS 托管商。

1984.is↗

Free DNS service with API and lots of other free DNS features included.带 API 的免费 DNS 服务，并附带大量其他免费 DNS 特性。

cloudns.net↗

Free DNS hosting up to 1 domain with 50 records免费 DNS 托管，最多 1 个域名与 50 条记录

deSEC↗

Free DNS hosting with API support, designed with security in mind. Runs on open-source software and is supported by SSE.支持 API、以安全为设计出发点的免费 DNS 托管。运行在开源软件上，并获 SSE 支持。

dns.he.net↗

Free DNS hosting service with Dynamic DNS Support支持动态 DNS 的免费 DNS 托管服务

dnspod.com↗

Free DNS hosting.免费 DNS 托管。

duckdns.org↗

Free DDNS with up to 5 domains on the free tier. With configuration guides for various setups.免费 DDNS，免费套餐最多 5 个域名。附带各种场景的配置指南。

Dynv6.com↗

Free DDNS service with API support and management of a lot of dns record types (like CNAME, MX, SPF, SRV, TXT and others).免费 DDNS 服务，支持 API，可管理多种 DNS 记录类型（如 CNAME、MX、SPF、SRV、TXT 等）。

freedns.afraid.org↗

Free DNS hosting. Also, provide free subdomains based on numerous public user contributed domains. Get free subdomains from the “Subdomains” menu after signing up.免费 DNS 托管。此外还基于大量公开用户贡献的域名提供免费子域名。注册后从 Subdomains 菜单获取免费子域名。

Glauca↗

Free DNS hosting for up to 3 domains and DNSSEC support最多 3 个域名的免费 DNS 托管，支持 DNSSEC

Hetzner↗

Free DNS hosting from Hetzner with API support.Hetzner 提供的免费 DNS 托管，支持 API。

huaweicloud.com↗

Free DNS hosting by Huawei华为提供的免费 DNS 托管

LocalCert↗

Free .localcert.net subdomains compatible with public CAs for use with-in private networks免费的 .localcert.net 子域名，与公共 CA 兼容，可用于私有网络内部

luadns.com↗

Free DNS hosting, three domains, all features with reasonable limits免费 DNS 托管，3 个域名，全部功能且限制合理

namecheap.com↗

Free DNS. No limit on the number of domains免费 DNS。域名数量不限

nextdns.io↗

DNS-based firewall, 300K free queries monthly基于 DNS 的防火墙，每月 30 万次免费查询

noip.at↗

Free DDNS service without registration, tracking, logging or advertising. No limit to domains.免费 DDNS 服务，无注册、无追踪、无日志、无广告。域名数量不限。

noip↗

a dynamic DNS service that allows up to 3 hostnames free with confirmation every 30 days动态 DNS 服务，最多可免费使用 3 个主机名，每 30 天需确认一次。

sslip.io↗

Free DNS service that when queried with a hostname with an embedded IP address returns that IP address.免费 DNS 服务：当查询的主机名中内嵌了 IP 地址时，直接返回该 IP 地址。

zilore.com↗

Free DNS hosting for 5 domains.面向 5 个域名的免费 DNS 托管。

zoneedit.com↗

Free DNS hosting with Dynamic DNS Support.支持动态 DNS 的免费 DNS 托管。

Zonomi↗

Free DNS hosting service with instant DNS propagation. Free plan: 1 DNS zone (domain name) with up to 10 DNS records.支持即时 DNS 生效的免费 DNS 托管服务。免费计划：1 个 DNS 区域（域名），最多 10 条 DNS 记录。

35Domain域名4▾

DigitalPlat↗

Free subdomains.免费子域名。

DNSHE↗

Free subdomain registration across multiple domain suffixes, with custom nameserver support.跨多个域名后缀的免费子域名注册，支持自定义域名服务器。

isroot.in↗

Free isroot.in subdomains.免费 isroot.in 子域名。

pp.ua↗

Free pp.ua subdomains.免费 pp.ua 子域名。

36IaaSIaaS 基础设施即服务4▾

4EVERLAND↗

Compatible with AWS S3 – APIs, interface operations, CLI, and other upload methods, upload and store files from the IPFS and Arweave networks in a safe, convenient, and efficient manner. Registered users can get 6 GB of IPFS storage and 300MB of Arweave storage for free. Any Arweave file uploads smaller than 150 KB are free.兼容 AWS S3 的 API、界面操作与 CLI 等上传方式，可安全便捷高效地上传与存储来自 IPFS 与 Arweave 网络的文件。注册用户可免费获得 6 GB IPFS 存储与 300 MB Arweave 存储。任何小于 150 KB 的 Arweave 文件上传免费。

backblaze.com↗

Backblaze B2 cloud storage. Free 10 GB (Amazon S3-like) object storage for unlimited timeBackblaze B2 云存储。免费 10 GB（类 Amazon S3）对象存储，不限时长

filebase.com↗

S3 Compatible Object Storage Powered by Blockchain. 5 GB free storage for an unlimited duration.由区块链驱动的兼容 S3 对象存储。免费 5 GB 存储，不限时长。

Modal↗

AI-driven IaaS with generous compute, storage; offers $30 (might be limited to $5 on certain accounts) of free monthly creditsAI 驱动的 IaaS，提供充裕的计算与存储资源；每月赠送 30 美元免费额度（部分账号可能限制为 5 美元）

37Managed Data Services托管数据服务26▾

8base.com↗

8base is a full-stack low-code development platform built for JavaScript developers built on top of MySQL and GraphQL and serverless backend-as-a-service. It allows you to start building web applications quickly using a UI app builder and scale quickly, The Free tier includes rows: 2,500, Storage: 500, Serverless computing: 1Gb/h, and client app users: 5.8base 是面向 JavaScript 开发者的全栈低代码开发平台，构建在 MySQL、GraphQL 与无服务器后端即服务之上。可用 UI 应用构建器快速搭建 Web 应用并迅速扩展。免费套餐包含 2,500 行数据、500 存储、1 GB/小时无服务器计算与 5 名客户端应用用户。

airtable.com↗

Looks like a spreadsheet, but it’s a relational database unlimited bases, 1,200 rows/base, and 1,000 API requests/month看起来像电子表格，其实是关系型数据库。不限数据库、每库 1,200 行与每月 1,000 次 API 请求

Aiven↗

Aiven offers free PostgreSQL, MySQL and Valkey (Redis compatible) plans on its open-source data platform. Single node, 1 CPU, 1GB RAM, and for PostgreSQL and MySQL, 1GB storage. Easy migration to more extensive plans or across clouds.Aiven 在其开源数据平台上提供免费的 PostgreSQL、MySQL 与 Valkey（兼容 Redis）计划。单节点、1 CPU、1 GB 内存，PostgreSQL 与 MySQL 另含 1 GB 存储。可轻松迁移到更大套餐或跨云迁移。

BackupDrill↗

Backs up Supabase projects to your own S3/R2/B2 bucket, then runs scheduled restore drills to prove backups restore. Provides a free plan with weekly backups for one project and one restore drill on your first backup.把 Supabase 项目备份到你自己的 S3/R2/B2 bucket，再按计划执行恢复演练以验证备份可还原。提供免费计划，含 1 个项目的每周备份与首次备份的 1 次恢复演练。

CockroachDB Cloud↗

Free tier offers 50 million RUs and 10 GiB of storage (same as 15$ worth) free per month. (What’s the Request Units)免费套餐每月提供 5,000 万 RU 与 10 GiB 存储（约等于价值 15 美元）。什么是 Request Units

codehooks.io↗

Easy to use JavaScript serverless API/backend and NoSQL database service with functions, Mongdb-ish queries, key/value lookups, a job system, realtime messages, worker queues, a powerful CLI and a web-based data manager. Free plan has 5GB storage and 60/API calls per minute. 2 developers included. No credit-card required.易用的 JavaScript 无服务器 API 与后端及 NoSQL 数据库服务，含函数、类 MongoDB 查询、键值查询、任务系统、实时消息、worker 队列、强大的 CLI 与基于 Web 的数据管理器。免费计划含 5 GB 存储与每分钟 60 次 API 调用，包含 2 名开发者，无需信用卡。

Couchbase Capella↗

deploy a forever free tier fully managed database cluster with 1 node and 8GB storage, built for developers to create the next generation of applications across IoT to AI部署永久免费的托管数据库集群，含 1 个节点与 8GB 存储，专为开发者打造从物联网到 AI 的下一代应用而构建。

CrateDB↗

Distributed Open Source SQL database for real-time analytics. Free Tier CRFREE: One-node with 2 CPUs, 2 GiB of memory, 8 GiB of storage. One cluster per organization, no payment method needed.面向实时分析的分布式开源 SQL 数据库。免费套餐 CRFREE：单节点，2 CPU、2 GiB 内存、8 GiB 存储。每个组织 1 个集群，无需支付方式。

filess.io↗

filess.io is a platform where you can create two databases with up to 10 MB per database of the following DBMS for free: MySQL, MariaDB, MongoDB, and PostgreSQL.filess.io 是一个平台，可免费创建两个数据库，每个数据库最大 10 MB，支持以下 DBMS：MySQL、MariaDB、MongoDB 与 PostgreSQL。

InfluxDB↗

Timeseries database, free up to 3MB/5 minutes writes, 30MB/5 minutes reads and 10,000 cardinalities series时序数据库，免费额度为每 5 分钟写入 3MB、读取 30MB，基数序列 10,000 个。

Layerbase↗

2 free managed databases, pick from: Postgres, MariaDB, Redis, Valkey, DuckDB, SQLite, libSQL, and TypeDB. All with TLS. Branch 7 of 8 free engines, 1 branch per database – 10 GB/day, 50 GB/week, 150 GB/month throughput limits on free. 10 additional engines available on higher tiers with no meters.2 个免费托管数据库，可选 Postgres、MariaDB、Redis、Valkey、DuckDB、SQLite、libSQL 与 TypeDB，全部启用 TLS。8 个免费引擎中可分支 7 个，每个数据库 1 个分支——免费额度吞吐限制为每天 10 GB、每周 50 GB、每月 150 GB。更高套餐另提供 10 个不计量的引擎。

MemCachier↗

Managed Memcache service. Free for up to 25MB, 1 Proxy Server, and basic analytics托管 Memcache 服务。最多 25 MB、1 个代理服务器与基础分析免费

MongoDB Atlas↗

free tier gives 512 MB免费档提供 512 MB。

Neo4j Aura↗

Managed native Graph DBMS / analytics platform with a Cypher query language and a REST API. Limits on graph size (200k nodes, 400k relationships).托管原生图数据库与分析平台，支持 Cypher 查询语言与 REST API。图规模有限制（20 万节点、40 万关系）。

Neon↗

Managed PostgreSQL, 0.5 GB of storage per project, 100 Projects ,10 branches per project, Unlimited Databases, always-available primary branch ( Auto suspend after 5 minutes), 20 hours of Active time per month (total) for non-primary branch compute.托管 PostgreSQL，每项目 0.5 GB 存储、100 个项目、每项目 10 个分支、不限数据库，主分支始终可用（5 分钟无活动后自动暂停），非主分支计算每月共 20 小时活跃时长。

Nile↗

A Postgres platform for B2B apps. Unlimited databases, Always available with no shutdown, 1GB of storage (total), 50 million query tokens, autoscaling, unlimited vector embeddings面向 B2B 应用的 Postgres 平台。无限数据库、始终可用不关停、1 GB 存储（总量）、5,000 万查询 token、自动扩缩容、无限向量嵌入

Prisma Postgres↗

Super fast hosted Postgres built on unikernels and running on bare metal, 500MB total storage, 5 databases, integrated with Prisma ORM.基于 unikernel 并运行在裸金属上的极快托管 Postgres，总存储 500 MB、5 个数据库，集成 Prisma ORM。

Qdrant↗

Vector Database for embedding data, single node cluster with 0.5 vCPU, 1GB RAM, and 4GB disk.用于向量嵌入数据的向量数据库，单节点集群配 0.5 vCPU、1GB 内存与 4GB 磁盘。

restdb.io↗

a fast and straightforward NoSQL cloud database service. With restdb.io you get schema, relations, automatic REST API (with MongoDB-like queries), and an efficient multi-user admin UI for working with data. The free plan allows 3 users, 2500 records, and 1 API request per second.快速直观的 NoSQL 云数据库服务。使用 restdb.io 可获得 schema、关系、自动 REST API（支持类 MongoDB 查询）以及高效的多用户数据管理界面。免费方案允许 3 名用户、2500 条记录与每秒 1 次 API 请求。

ReviveDB↗

A way back for your Supabase app. ReviveDB keeps recovery points of your database and Auth, Storage files, Edge Functions and supported project configuration, and only calls a backup ready once your database has been restored from it and compared. The free plan covers one project with weekly backups and three recovery points.为你的 Supabase 应用留一条回头路。ReviveDB 保存数据库以及 Auth、存储文件、Edge Functions 与受支持项目配置的恢复点，只有在数据库从备份恢复并比对通过后才算一次可用备份。免费计划覆盖 1 个项目，含每周备份与 3 个恢复点。

SeaTable↗

Flexible, Spreadsheet-like Database built by the Seafile team. unlimited tables, 2,000 lines, 1-month versioning, up to 25 team members.由 Seafile 团队打造的灵活、类电子表格数据库。不限表数、2,000 行、1 个月版本历史，最多 25 名团队成员。

skyvia.com↗

Cloud Data Platform offers a free tier and all plans are completely free while in betaCloud Data Platform 提供免费套餐，且测试期间所有计划完全免费

StackBy↗

One tool that combines spreadsheets’ flexibility, databases’ power, and built-in integrations with your favorite business apps. The free plan includes unlimited users, ten stacks, and a 2GB attachment per stack.一款把电子表格的灵活、数据库的能力与你常用业务应用的集成合而为一的工具。免费计划含不限用户、10 个 stack 与每个 stack 2 GB 附件。

Tinybird↗

A serverless managed ClickHouse with connection-less data ingest over HTTP and lets you publish SQL queries as managed HTTP APIs. There is no time limit on free-tier, 10GB storage + 1000 API requests per day.无服务器托管版 ClickHouse，支持通过 HTTP 免连接写入数据，并可将 SQL 查询发布为托管 HTTP API。免费套餐无时间限制，10 GB 存储与每天 1,000 次 API 请求。

Turso by ChiselStrike↗

Turso is SQLite Developer Experience in an Edge Database. Turso provides a Free Forever starter plan, 9 GB of total storage, Up to 500 databases, Up to 3 locations, 1 billion row reads per month, and Local development support with SQLite.Turso 把 SQLite 的开发者体验带到了边缘数据库。Turso 提供永久免费入门方案：总存储 9 GB、最多 500 个数据库、最多 3 个地域、每月 10 亿行读取，并支持用 SQLite 进行本地开发。

Upstash↗

Serverless Redis with free tier up to 500K monthly commands, 256MB max database size, and 20 concurrent connections无服务器 Redis，免费套餐每月最多 50 万条命令、数据库最大 256 MB 与 20 个并发连接

38Tunneling, WebRTC, Web Socket Servers and Other Routers内网穿透、WebRTC、WebSocket 与其他路由19▾

cname.dev↗

Free and secure dynamic reverse proxy service.免费且安全的动态反向代理服务。

conveyor.cloud↗

Visual Studio extension to expose IIS Express to the local network or over a tunnel to a public URL.一个 Visual Studio 扩展，可将 IIS Express 暴露到局域网，或通过隧道暴露到公网 URL。

Expose↗

Expose local sites via secure tunnels. The free plan includes an EU Server, Random subdomains, and Single users.通过安全隧道暴露本地站点。免费计划含 1 台欧洲服务器、随机子域名与单用户。

Hamachi↗

LogMeIn Hamachi is a hosted VPN service that lets you securely extend LAN-like networks to distributed teams with a free plan that allows unlimited networks with up to 5 peopleLogMeIn Hamachi 是托管的 VPN 服务，可安全地把类局域网扩展到分布式团队。免费计划支持不限网络、每网最多 5 人

Hookdeck↗

Develop, test, and monitor your webhooks from anywhere. 100K requests and 100K attempts per month with three days retention.在任何地方开发、测试并监控你的 Webhook。每月 10 万次请求与 10 万次尝试，保留 3 天。

localhost.run↗

Expose locally running servers over a tunnel to a public URL.通过隧道把本地运行的服务暴露到公网 URL。

localtonet↗

Multi-protocol tunneling for HTTP, TLS, TCP, UDP, File Server (Default, SFTP, WebDAV), and Proxy Tunnel (HTTP, SOCKS5, Shadowsocks, VLESS). Free plan: 1 tunnel, 1GB/month bandwidth, 30 min timeout (excl. HTTP Tunnels).支持 HTTP、TLS、TCP、UDP、文件服务器（默认、SFTP、WebDAV）与代理隧道（HTTP、SOCKS5、Shadowsocks、VLESS）的多协议隧道。免费计划：1 条隧道、每月 1 GB 带宽、30 分钟超时（不含 HTTP 隧道）。

localtunnel↗

Expose locally running servers over a tunnel to a public URL. Free hosted version, and open source.通过隧道把本地运行的服务暴露到公网 URL。提供免费托管版，且已开源。

LocalXpose↗

Reverse proxy that enables you to expose your localhost servers to the internet. The free plan has 15 minutes tunnel lifetime.反向代理，让你把本地服务器暴露到公网。免费计划隧道生命周期 15 分钟。

ngrok.com↗

Expose locally running servers over a tunnel to a public URL.通过隧道把本地运行的服务暴露到公网 URL。

Pinggy↗

Public URLs for localhost with a single command, no downloads required. HTTPS / TCP / TLS tunnels. The free plan has 60 minutes tunnel lifetime.一条命令为 localhost 生成公开 URL，无需下载。支持 HTTPS、TCP 与 TLS 隧道。免费计划隧道生命周期 60 分钟。

Radmin VPN↗

Connect multiple computers together via a VPN-enabling LAN-like network. Unlimited peers. (Hamachi alternative)通过类局域网 VPN 把多台电脑连起来。对等节点不限量。（Hamachi 替代品）

serveo↗

Expose local servers to the internet. No installation, no signup. Free subdomain, no limits.把本地服务器暴露到公网。无需安装、无需注册。免费子域名，无限制。

stun:global.stun.twilio.com:3478?transport=udpNon-HTTP 非 HTTP 链接

Twilio STUNTwilio STUN 服务。

stun:stun.l.google.com:19302Non-HTTP 非 HTTP 链接

Google STUNGoogle STUN

Tailscale↗

Zero config VPN, using the open-source WireGuard protocol. Installs on MacOS, iOS, Windows, Linux, and Android devices. Free plan for personal use with 100 devices and three users.零配置 VPN，使用开源 WireGuard 协议。可安装在 MacOS、iOS、Windows、Linux 与 Android 设备上。个人使用免费方案支持 100 台设备与 3 名用户。

webhookrelay.com↗

Manage, debug, fan-out, and proxy all your webhooks to public or internal (i.e. localhost) destinations. Also, expose servers running in a private network over a tunnel by getting a public HTTP endpoint (https://yoursubdomain.webrelay.io <----> http://localhost:8080).管理、调试、扇出并代理你的所有 Webhook 到公开或内部（如 localhost）目标。此外还可通过获取公开 HTTP 端点（https://yoursubdomain.webrelay.io <----> http://localhost:8080）把私有网络中的服务器通过隧道暴露出来。

Xirsys↗

Unlimited STUN usage + 500 MB monthly TURN bandwidth, capped bandwidth, single geographic region.STUN 使用不限量，外加每月 500 MB TURN 带宽；带宽有上限，仅限单一地理区域。

ZeroTier↗

FOSS managed virtual Ethernet as a service. Unlimited end-to-end encrypted networks of 25 clients on the free plan. Clients for desktop/mobile/NA; web interface for configuration of custom routing rules and approval of new client nodes on private networks开源的托管虚拟以太网服务。免费计划支持不限数量的端到端加密网络，每网 25 个客户端。提供桌面、移动与北美客户端；Web 界面可配置自定义路由规则，并在私有网络中审批新的客户端节点

39Issue Tracking and Project Management缺陷跟踪与项目管理60▾

acunote.com↗

Free project management and SCRUM software for up to 5 team members面向最多 5 名团队成员免费的项目管理与 SCRUM 软件

asana.com↗

Free for private project with collaborators带协作者的私有项目免费

Backlog↗

Everything your team needs to release great projects in one platform. The free plan offers 1 Project with ten users & 100MB of storage.团队发布优秀项目所需的一切都在一个平台。免费计划提供 1 个项目、10 名用户与 100 MB 存储。

Basecamp↗

To-do lists, milestone management, forum-like messaging, file sharing, and time tracking. Up to 3 projects, 20 users, and 1GB of storage space.待办清单、里程碑管理、类论坛的消息、文件分享与工时跟踪。最多 3 个项目、20 名用户、1GB 存储空间。

bitrix24.com↗

Intranet and project management tool. The free plan has 5GB for unlimited users.内网与项目管理工具。免费计划提供 5 GB 且不限用户。

cacoo.com↗

Online real-time diagrams: flowchart, UML, network. Free max. 15 users/diagram, 25 sheets在线实时图表：流程图、UML、网络图。免费最多 15 名用户每图与 25 张图纸

clickup.com↗

Project management. Free, premium version with cloud storage. Mobile applications and Git integrations are available.项目管理。免费版，高级版含云存储。提供移动端应用与 Git 集成。

Clockify↗

Time tracker and timesheet app that lets you track work hours across projects. Unlimited users, free forever.工时跟踪与时间表应用，可跨项目记录工作时间。用户数不限，永久免费。

Cloudcraft↗

Design a professional architecture diagram in minutes with the Cloudcraft visual designer, optimized for AWS with intelligent components that show live data too. Free plan has unlimited private diagrams for single user.用 Cloudcraft 可视化设计器几分钟内设计专业架构图，专为 AWS 优化，智能组件还能展示实时数据。免费计划为单用户提供不限私有架构图。

Confluence↗

Atlassian’s content collaboration tool is used to help teams collaborate and share knowledge efficiently. Free plan for up to 10 users.Atlassian 的内容协作工具，帮助团队高效协作与共享知识。最多 10 名用户免费。

Crosswork↗

Versatile project management platform. Free for up to 3 projects, unlimited users, 1 GB storage.用途广泛的项目管理平台。最多 3 个项目免费，用户数不限，1 GB 存储。

diagrams.net↗

Online diagrams stored locally in Google Drive, OneDrive, or Dropbox. Free for all features and storage levels在线图表，本地存储在 Google Drive、OneDrive 或 Dropbox 中。全部功能与存储档位免费

easyretro.io↗

Simple and intuitive sprint retrospective tool. The free plan has three public boards and one survey per board per month.简单直观的冲刺回顾工具。免费计划含 3 个公开看板与每个看板每月 1 份问卷。

freedcamp.com↗

tasks, discussions, milestones, time tracking, calendar, files and password manager. Free plan with unlimited projects, users, and file storage.任务、讨论、里程碑、工时跟踪、日历、文件与密码管理器。免费方案项目、用户与文件存储均不限量。

GForge↗

Project Management and issue Tracking toolset for complex projects with self-premises and SaaS options. SaaS free plan offers the first five users free & free for Open Source Projects.面向复杂项目的项目管理与缺陷跟踪工具集，提供私有部署与 SaaS 两种选择。SaaS 免费计划前 5 名用户免费，且对开源项目免费。

gleek.io↗

Free description-to-diagrams tool for developers. Create informal UML class, object, or entity-relationship diagrams using your keyword.面向开发者的免费描述转图表工具。用你的关键字创建非正式的 UML 类图、对象图或实体关系图。

GraphQL Inspector↗

GraphQL Inspector outputs a list of changes between two GraphQL schemas. Every difference is precisely explained and marked as breaking, non-breaking, or dangerous.GraphQL Inspector 会输出两个 GraphQL schema 之间的变更列表。每处差异都被精确解释，并标记为破坏性、非破坏性或危险。

Helploom↗

Customer support software that offers a live chat on the free forever plan. Simple, lightweight and beautiful. Setup is a simple copy-paste script. Built by a developer.提供在线聊天的客户支持软件，永久免费计划。简洁轻量且美观。配置只需复制粘贴一段脚本。由开发者打造。

HeyRetro↗

Real-time sprint retrospective platform with voting, timers, surveys, guest collaboration, and ice-breaker games. The forever-free plan includes one board per month, anonymous surveys, and guest link sharing.实时冲刺回顾平台，具备投票、计时器、问卷、访客协作与破冰游戏。永久免费计划含每月 1 个看板、匿名问卷与访客链接分享。

Hygger↗

Project management platform. The free plan offers unlimited users, projects & boards with 100 MB of Storage.项目管理平台。免费计划提供不限用户、项目与看板，以及 100 MB 存储。

Ilograph↗

interactive diagrams that allow users to see their infrastructure from multiple perspectives and levels of detail. Charts can be expressed in code. The free tier has unlimited private diagrams with up to 3 viewers.交互式图表，让用户从多个视角与细节层级审视自己的基础设施。图表可用代码表达。免费档私有图表不限量，最多 3 名查看者。

Jira↗

Advanced software development project management tool used in many corporate environments. Free plan for up to 10 users.许多企业环境在用的高级软件开发项目管理工具。最多 10 名用户免费。

kan.bn↗

A powerful, flexible kanban app that helps you organise work, track progress, and deliver results-all in one place. Free plan up to 1 user for unlimited boards, unlimited lists, unlimited cards.强大灵活的看板应用，帮助你在同一处组织工作、跟踪进度并交付结果。免费计划支持 1 名用户，看板、列表与卡片均不限量。

kanbanflow.com↗

Board-based project management. Free, premium version with more options基于看板的项目管理。免费版，高级版提供更多选项

kanbantool.com↗

Kanban board-based project management. The free plan has two boards and two users, without attachments or files.基于看板的项目管理。免费计划含 2 个看板与 2 名用户，无附件与文件功能。

Kitemaker.co↗

Collaborate through all phases of the product development process and keep track of work across Slack, Discord, Figma, and Github. Unlimited users, unlimited spaces. Free plan up to 250 work items.在产品开发全流程中协作，并在 Slack、Discord、Figma 与 GitHub 上跟踪工作。不限用户与空间，免费计划最多 250 个工作项。

Kiter.app↗

Let anyone organize their job search and track interviews, opportunities, and connections. Powerful web app and Chrome extension. Completely free.让任何人都能组织求职并跟踪面试、机会与人脉。强大的 Web 应用与 Chrome 扩展。完全免费。

Kumu.io↗

Relationship maps with animation, decorations, filters, clustering, spreadsheet imports, etc. The free tier allows unlimited public projects. Graph size unlimited. Free private projects for students. Sandbox mode is available if you prefer not to leave your file publicly online (upload, edit, download, discard).关系图谱，支持动画、装饰、筛选、聚类与电子表格导入等。免费套餐允许不限公开项目，图规模不限。学生可免费使用私有项目。若不想把文件公开在网上，可使用沙箱模式（上传、编辑、下载、丢弃）。

leiga.com↗

Leiga is a SaaS product that uses AI to automatically manage your projects, helping your team stay focused and unleash immense potential, ensuring your projects progress as planned. Free for up to 10 users, 20 custom fields, 2GB of storage space, Video Recording with AI limited to 5 mins/video, Automation Runs at 20/user/month.Leiga 是用 AI 自动管理项目的 SaaS 产品，帮助团队保持专注、释放潜力，确保项目按计划推进。最多 10 名用户免费，含 20 个自定义字段、2 GB 存储空间、AI 录屏（每个视频限 5 分钟）与自动化运行（每人每月 20 次）。

Linear↗

Issue tracker with a streamlined interface. Free for unlimited members, up to 10MB file upload size, 250 issues (excluding Archive)界面简洁的缺陷跟踪工具。不限成员免费，单文件上传上限 10 MB，250 个缺陷（不含归档）

Lucidchart↗

An online diagram tool with collaboration features. Free plan with three editable documents, 100 professional templates, and basic collaboration features.带协作功能的在线绘图工具。免费计划含 3 个可编辑文档、100 个专业模板与基础协作功能。

MeisterTask↗

Online task management for teams. Free up to 3 projects and unlimited project members.面向团队的在线任务管理。最多 3 个项目免费，项目成员不限。

MeuScrum↗

Free online scrum tool with kanban board带看板的免费在线 Scrum 工具

myspec.dev↗

Spec-Driven Development (SDD) architect tool that interviews developers and generates structured 4-file spec bundles with MCP server integration. Free tier covers 20 projects and 100 spec files.规格驱动开发（SDD）架构工具，会访谈开发者并生成结构化的四文件规格包，并集成 MCP server。免费套餐覆盖 20 个项目与 100 个规格文件。

nTask↗

Project management software that enables your teams to collaborate, plan, analyze, and manage everyday tasks. The essential plan is free forever with 100 MB storage and five users/teams. Unlimited workspaces, meetings, assignments, timesheets, and issue tracking.项目管理软件，让团队协作、规划、分析并管理日常工作。基础计划永久免费，含 100 MB 存储与 5 名用户或团队。不限工作区、会议、指派、工时表与缺陷跟踪。

Plane↗

Plane is a simple, extensible, open-source project and product management tool. Free for unlimited members, up to 5MB file upload size, 1000 issues.Plane 是简单、可扩展的开源项目与产品管理工具。不限成员免费，单文件上传上限 5 MB，1,000 个缺陷。

planitpoker.com↗

Free online planning poker (estimation tool)免费的在线计划扑克（估算工具）

point.poker↗

Online Planning Poker (consensus-based estimation tool). Free for unlimited users, teams, sessions, rounds, and votes. You don’t need to register.在线计划扑克（基于共识的估算工具）。不限用户、团队、会话、轮次与投票，免费。无需注册。

Pulse.red↗

Free Minimalistic Time Tracker and Timesheet app for projects.面向项目的免费极简时间跟踪与工时表应用。

ScrumFast↗

Scrum board with a very intuitive interface, free up to 5 users.界面非常直观的 Scrum 看板，最多 5 名用户免费。

Sflow↗

sflow.io is a project management tool built for agile software development, marketing, sales, and customer support, especially for outsourcing and cross-organization collaboration projects. Free plan up to 3 projects and five members.sflow.io 是一款为敏捷软件开发、市场、销售与客户支持打造的项目管理工具，尤其适合外包与跨组织协作项目。免费方案支持最多 3 个项目与 5 名成员。

Shake↗

In-app bug reporting and feedback tool for mobile apps. Free plan, ten bug reports per app/month.面向移动应用的应用内缺陷上报与反馈工具。免费计划每个应用每月 10 条缺陷报告。

Shortcut↗

Project management platform. Free for up to 10 users forever.项目管理平台。最多 10 名用户永久免费。

taiga.io↗

Project management platform for startups and agile developers, free for Open Source面向初创公司与敏捷开发者的项目管理平台，对开源免费

taskade.com↗

Real-time collaborative task lists and team outlines. The free plan has one workspace with unlimited tasks and projects; 1GB file storage; 1-week project history; and five attendees per video meeting.实时协作任务清单与团队大纲。免费计划含 1 个工作区，任务与项目不限；1 GB 文件存储；1 周项目历史；每次视频会议 5 名参会者。

Teaminal↗

Standup, retro, and sprint planning tool for remote teams. Free for up to 15 users.面向远程团队的站会、回顾与冲刺规划工具。最多 15 名用户免费。

teamwork.com↗

Project management & Team Chat. Free for five users and two projects. Premium plans are available.项目管理与团队聊天。5 名用户与 2 个项目免费，另提供高级计划。

teleretro.com↗

Simple and fun retrospective tool with icebreakers, gifs and emojis. The free plan includes three retros and unlimited members.简单有趣的回顾工具，含破冰、动图与表情。免费计划含 3 次回顾与不限成员。

Tenzu↗

Lightweight project management tool for agile teams. The SaaS relies on free contributions; users can always choose to give 0 and there is no features paywall {more details}面向敏捷团队的轻量项目管理工具。该 SaaS 依靠自由付费，用户始终可以选择付 0，且没有功能付费墙{更多详情}

titanapps.io↗

productivity tools for Jira and monday.com offering structured checklists, templates, and approvals inside issues/tasks. Free plan available for small teams.面向 Jira 与 monday.com 的效率工具，在议题 / 任务内提供结构化清单、模板与审批。小团队可使用免费方案。

todoist.com↗

Collaborative and individual task management. The free plan has: 5 active projects, five users in the project, file uploading up to 5MB, three filters, and one week of activity history.协作与个人任务管理。免费计划含 5 个活跃项目、项目中 5 名用户、最大 5 MB 文件上传、3 个筛选器与一周活动历史。

Toggl↗

Provides two free productivity tools. Toggl Track for time management and tracking app with a free plan provides seamless time tracking and reporting designed with freelancers in mind. It has unlimited tracking records, projects, clients, tags, reporting, and more. And Toggl Plan for task planning with a free plan for solo developers with unlimited tasks, milestones, and timelines.提供两款免费生产力工具。Toggl Track 是时间管理与跟踪应用，免费计划提供为自由职业者设计的时间跟踪与报表，含不限跟踪记录、项目、客户、标签与报表等。以及 Toggl Plan，用于任务规划，为独立开发者提供免费计划，含不限任务、里程碑与时间线。

trello.com↗

Board-based project management. Unlimited Personal Boards, 10 Team Boards.基于看板的项目管理。不限个人看板、10 个团队看板。

Tweek↗

Simple Weekly To-Do Calendar & Task Management.简单的每周待办日历与任务管理。

Wikifactory↗

Product designing Service with Projects, VCS & Issues. The free plan offers unlimited projects & collaborators and 3GB storage.产品设计服务，含项目、版本控制与缺陷跟踪。免费计划提供不限项目与协作者，以及 3 GB 存储。

Yodiz↗

Agile development and issue tracking. Free up to 3 users, unlimited projects.敏捷开发与缺陷跟踪。最多 3 名用户与不限项目免费。

YouTrack↗

Free hosted YouTrack (InCloud) for FOSS projects and private projects (free for three users). Includes time tracking and agile boards面向 FOSS 项目与私有项目（3 名用户免费）的免费托管 YouTrack（InCloud）。含时间跟踪与敏捷看板

zenhub.com↗

The only project management solution inside GitHub. Free for public repos, OSS, and nonprofit organizations唯一内置于 GitHub 的项目管理方案。对公开仓库、开源项目与非营利组织免费。

zenkit.com↗

Project management and collaboration tool. Free for up to 5 members, 5 GB attachments.项目管理与协作工具。最多 5 名成员与 5 GB 附件免费。

Zube↗

Project management with free plan for 4 Projects & 4 users. GitHub integration is available.项目管理，免费计划支持 4 个项目与 4 名用户。提供 GitHub 集成。

40Storage and Media Processing存储与媒体处理50▾

AndroidFileHost↗

Free file-sharing platform with unlimited speed, bandwidth, file count, download count, etc. It is mainly aimed for Android dev-related files like APK build, custom ROM & modifications, etc. But seems to accept any other files as well.免费文件分享平台，速度、带宽、文件数与下载次数均不限。主要面向 Android 开发相关文件（如 APK 构建、自定义 ROM 与修改包等），但似乎也接受其他文件。

anon.li Drop↗

Zero-knowledge E2EE file sharing with client-side AES-256-GCM encryption and zero server-side data access. Free uploads for files up to 5GB with max expiry up to 3 days through the website, CLI or API.零知识端到端加密文件分享，采用客户端 AES-256-GCM 加密，服务端零数据访问。通过网站、CLI 或 API 上传最大 5GB 的文件免费，最长有效期 3 天。

borgbase.com↗

Simple and secure offsite backup hosting for Borg Backup. 10 GB free backup space and two repositories.面向 Borg Backup 的简单安全的异地备份托管。10 GB 免费备份空间与 2 个仓库。

cloudinary.com↗

Image upload, powerful manipulations, storage, and delivery for sites and apps, with Ruby, Python, Java, PHP, Objective-C, and more libraries. The free tier includes 25 monthly credits. One credit equals 1,000 image transformations, 1 GB of storage, or 1 GB of CDN usage.面向站点与应用的图片上传、强大处理、存储与分发，提供 Ruby、Python、Java、PHP、Objective-C 等库。免费套餐每月含 25 额度，1 额度等于 1,000 次图片转换、1 GB 存储或 1 GB CDN 用量。

degoo.com↗

AI based cloud storage with free up to 20 GB, three devices, 5 GB referral bonus (90 days account inactivity).基于 AI 的云存储，免费最多 20 GB、3 台设备，推荐奖励 5 GB（账号停用 90 天后失效）。

dlvr.sh↗

Temporary file delivery for agents and automation. Free tier includes 10 deliveries every 24 hours with API, MCP, and CLI access.面向智能体与自动化的临时文件投递服务。免费档包含每 24 小时 10 次投递，并提供 API、MCP 与 CLI 访问。

Dropshare↗

Zero-knowledge file sharing. End-to-end encrypted file sharing with AES-256-GCM encryption, client-side processing, and zero server-side data access. Free uploads for files up to 1GB with no data collection.零知识文件分享。端到端加密文件分享，采用 AES-256-GCM 加密、客户端处理，服务端零数据访问。最大 1GB 的文件免费上传，且不收集任何数据。

embed.ly↗

Provides APIs for embedding media in a webpage, responsive image scaling, and extracting elements from a webpage. Free for up to 5,000 URLs/month at 15 requests/second提供在网页中嵌入媒体、响应式图片缩放与从网页提取元素的 API。每月最多 5,000 个 URL 免费，速率 15 次请求每秒

Ente↗

Ente is an end-to-end encrypted cloud for photos, videos and 2FA secrets. Can also be self-hosted along with a generous forever free-tier of 10GB. For free tier users, only single replica of data is kept.Ente 是端到端加密的照片、视频与 2FA 密钥云盘。也可自托管，并提供 10 GB 的永久免费额度。免费用户的数据仅保留单副本。

FileShot.io↗

Zero-knowledge encrypted file sharing. AES-256-GCM browser-side encryption ensures files are encrypted in-browser before upload. No account required for sender or recipient. Self-hostable (MIT open-source). Free tier includes unlimited uploads with no file size restrictions.零知识加密文件分享。AES-256-GCM 浏览器端加密确保文件在上传前已在浏览器内加密。发送方与接收方均无需账号。可自托管（MIT 开源）。免费档上传不限量且无文件大小限制。

file.io↗

2 GB storage of files. A file is auto-deleted after one download. REST API to interact with the storage. Rate limit one request/minute.2 GB 文件存储。文件被下载一次后自动删除。提供 REST API 操作存储，限速每分钟 1 次请求。

freetools.site↗

Free online tools. Convert or edit documents, images, audio, video, and more.免费在线工具。可转换或编辑文档、图片、音频、视频等。

getpantry.cloud↗

A simple JSON data storage API perfect for personal projects, hackathons, and mobile apps!简单的 JSON 数据存储 API，非常适合个人项目、黑客松与移动应用。

GoFile.io↗

Free file sharing and storage platform can be used via web-based UI & also API. unlimited file size, bandwidth, download count, etc. But it will be deleted when a file becomes inactive (no download for more than ten days).免费文件分享与存储平台，可通过 Web 界面与 API 使用。单文件大小、带宽、下载次数均不限。但文件不活跃后会被删除（超过十天未下载）。

gumlet.com↗

Image and video hosting, processing and streaming via CDN. Provides generous free tier of 250 GB / month for videos and 30 GB / month for images.通过 CDN 进行图片与视频的托管、处理与流式分发。提供慷慨的免费额度：视频每月 250 GB、图片每月 30 GB。

hyperserve.io↗

Video backend API for developers: accept any format your users upload, transcode to MP4, and deliver globally via CDN. The free tier includes 50 videos, 1 GB per file, and 250 GB bandwidth per month.面向开发者的视频后端 API：接受用户上传的任意格式，转码为 MP4，并通过 CDN 全球分发。免费档含 50 个视频、单文件 1 GB 与每月 250 GB 带宽。

icedrive.net↗

Simple cloud storage service. 10 GB free storage简单的云存储服务。10 GB 免费存储

image-charts.com↗

Unlimited image chart generation with a watermark带水印的图表图片生成不限量。

ImageEngine↗

ImageEngine is an easy to use global image CDN. Sub 60 sec setup. AVIF and JPEGXL support, WordPress-, Magento-, React-, Vue- plugins and more. Claim your free developer account here.ImageEngine 是易用的全球图片 CDN。60 秒内完成接入。支持 AVIF 与 JPEGXL，提供 WordPress、Magento、React、Vue 插件等。可在此处申请免费开发者账号。

imagekit.io↗

Image CDN with automatic optimization, real-time transformation, and storage that you can integrate with existing setup in minutes. The free plan includes up to 20GB of bandwidth per month.具备自动优化、实时转换与存储的图片 CDN，几分钟内即可接入现有架构。免费计划每月最多 20 GB 带宽。

ImgBB↗

ImgBB is an unlimited image hosting service. Drag and drop your image anywhere on the screen. 32 MB / image limit. Receive Direct image links, BBCode and HTML thumbnails after uploading image. Login to see the upload history.ImgBB 是不限量的图床服务。把图片拖拽到屏幕任意位置即可。单图限 32 MB。上传后可获得直链、BBCode 与 HTML 缩略图。登录后可查看上传历史。

Imgbot↗

Imgbot is a friendly robot that optimizes your images and saves you time. Optimized images mean smaller file sizes without sacrificing quality. It’s free for open source.Imgbot 是一款友好的机器人，帮你优化图片、节省时间。优化后的图片在不牺牲质量的前提下体积更小。对开源免费。

imgen↗

On the fly image generation API (text over background, logo) for opengraph images, free, no watermark, CDN实时图片生成 API（背景叠加文字、Logo），用于 opengraph 图片，免费、无水印、含 CDN

imgix↗

Image Caching, management and CDN. Free plan includes 1000 origin images, infinite transformations and 100 GB bandwidth图片缓存、管理与 CDN。免费计划含 1,000 张源图、不限转换次数与 100 GB 带宽

internxt.com↗

Internxt Drive is a zero-knowledge file storage service based on absolute privacy and uncompromising security. Sign up and get 10 GB for free, forever!Internxt Drive 是零知识文件存储服务，以绝对隐私与毫不妥协的安全为核心。注册即得 10 GB，永久免费！

kraken.io↗

Image optimization for website performance as a service, free plan up to 1 MB file size以服务形式提供网站性能图片优化，免费计划单文件最大 1 MB

LibreQR↗

Free QR code generator focused on privacy and no tracking. Free to use with no data collection.注重隐私且无追踪的免费二维码生成器。免费使用，不收集数据。

MConverter↗

Convert files in bulk. Supports many formats, including AVIF and JXL. Extract image frames from videos. Compress PDFs. Free for 15 files per 24h, up to 100 MB each, processed in batches of eight.批量转换文件。支持多种格式，含 AVIF 与 JXL。可从视频中抽取图像帧，可压缩 PDF。每 24 小时免费 15 个文件，单个最大 100 MB，按每批 8 个处理。

nitropack.io↗

Accelerate your site’s speed on autopilot with complete front-end optimization (caching, images and code optimization, CDN). Free for up to 5,000 pageviews/month全自动加速网站速度，提供完整的前端优化（缓存、图片与代码优化、CDN）。每月最多 5,000 次页面浏览免费

npoint.io↗

JSON store with collaborative schema editing支持协作编辑 schema 的 JSON 存储

MantleDB↗

Anonymous JSON storage for scripts and tiny apps. No signup required; uses Master AID for updates and Read-Only RID for public fetching. Free tier includes 1 bucket (1MB limit) with a 72h inactivity scavenger policy.面向脚本与小应用的匿名 JSON 存储。无需注册；更新用 Master AID，公开读取用只读 RID。免费套餐含 1 个 bucket（限制 1 MB），并有 72 小时不活跃清理策略。

otixo.com↗

Encrypt, share, copy, and move all your cloud storage files from one place. The basic plan provides unlimited file transfer with 250 MB max. file size and allows five encrypted files在一处加密、分享、复制与移动你的所有云存储文件。基础计划提供不限文件传输，单文件最大 250 MB，并允许 5 个加密文件

packagecloud.io↗

Hosted Package Repositories for YUM, APT, RubyGem and PyPI. Limited free plans and open-source plans are available via request面向 YUM、APT、RubyGem 与 PyPI 的托管软件包仓库。提供有限免费计划，开源计划可申请

pcloud.com↗

Cloud storage service. Up to 10 GB of free storage云存储服务。最多 10 GB 免费存储

Pinata IPFS↗

Pinata is the simplest way to upload and manage files on IPFS. Our friendly user interface and IPFS API make Pinata the easiest IPFS pinning service for platforms, creators, and collectors. 1 GB storage free, along with access to API.Pinata 是在 IPFS 上上传与管理文件最简单的方式。友好的用户界面与 IPFS API 让 Pinata 成为平台、创作者与收藏者最容易上手的 IPFS 固定服务。免费 1 GB 存储，并可访问 API。

plot.ly↗

Graph and share your data. The free tier includes unlimited public files and ten private files绘制并分享数据。免费套餐含不限公开文件与 10 个私有文件

podio.com↗

You can use Podio with a team of up to five people and try out the features of the Basic Plan, except user management你可以与最多 5 人的团队一起使用 Podio，并体验基础方案的功能（用户管理除外）。

Proton Drive↗

Ultra-secure cloud storage for files and key documents. Free plan offers 5gb of storage space.面向文件与重要文档的超安全云存储。免费方案提供 5gb 存储空间。

QRtracer↗

Free QR code generator with built-in scan analytics, bulk generation & brand customisation, focused on reliability without any ads.免费二维码生成器，内置扫码分析、批量生成与品牌定制，注重可靠性且无广告。

QuickChart↗

Generate embeddable image charts, graphs, and QR codes生成可嵌入的图片图表、图形与二维码

redbooth.com↗

P2P file syncing, free for up to 2 usersP2P 文件同步，最多 2 名用户免费

resmush.it↗

reSmush.it is a FREE API that provides image optimization. reSmush.it has been implemented on the most common CMS such as WordPress, Drupal, or Magento. reSmush.it is the most used image optimization API with more than seven billion images already treated, and it is still Free of charge.reSmush.it 是一个提供图像优化的免费 API。reSmush.it 已集成到 WordPress、Drupal、Magento 等最常见的 CMS 中。reSmush.it 是使用最广的图像优化 API，已处理超过 70 亿张图片，且依然免费。

sirv.com↗

Smart Image CDN with on-the-fly image optimization and resizing. The free tier includes 500 MB of storage and 2 GB of bandwidth.智能图片 CDN，支持实时图片优化与缩放。免费套餐含 500 MB 存储与 2 GB 带宽。

SlingSite↗

Create all the optimized versions of your images and videos. For Free. In bulk. For each image, you get the following formats: AVIF, WEBP and JPG in the three selected resolutions (desktop, tablet, mobile) For videos, you get: WebM (codec VP9), MP4 (codec HEVC aka H.265) and MP4 (codec AVC aka H.264) plus the cover image with the first frame.生成图片与视频的全部优化版本。免费、批量。每张图片你可获得 AVIF、WEBP 与 JPG 三种格式，各 3 个所选分辨率（桌面、平板、手机）；视频则可获得 WebM（VP9 编码）、MP4（HEVC 即 H.265）与 MP4（AVC 即 H.264），以及首帧封面图。

sync.com↗

End-to-End cloud storage service. 5 GB of free storage端到端加密的云存储服务。5 GB 免费存储

tinypng.com↗

API to compress and resize PNG and JPEG images, offers 500 compressions for free each month压缩与调整 PNG、JPEG 图片尺寸的 API，每月免费 500 次压缩

transloadit.com↗

Handles file uploads and encoding of video, audio, images, documents. Free for Open source, charities, and students via the GitHub Student Developer Pack. Commercial applications get 2 GB free for test driving处理视频、音频、图片与文档的文件上传与编码。通过 GitHub Student Developer Pack 对开源项目、慈善机构与学生免费。商业应用可获 2 GB 免费额度用于试用

twicpics.com↗

Responsive images as a service. It provides an image CDN, a media processing API, and a frontend library to automate image optimization. The service is free for up to 3GB of traffic/per month.响应式图片即服务。提供图片 CDN、媒体处理 API 与前端库以自动化图片优化。每月最多 3 GB 流量免费。

uploadcare.com↗

Uploadcare provides the media pipeline with the ultimate toolkit based on cutting-edge algorithms. All features are available for developers absolutely for free: File Uploading API and UI, Image CDN and Origin Services, Adaptive Delivery, and Smart Compression. The free tier has 3000 uploads, 3 GB traffic, and 3 GB storage.Uploadcare 提供基于前沿算法的媒体处理流水线工具集。面向开发者，所有功能完全免费：文件上传 API 与 UI、图片 CDN 与源站服务、自适应分发与智能压缩。免费档含 3000 次上传、3 GB 流量与 3 GB 存储。

VaocherApp QR Code Generator↗

Easily create custom QR codes for gift cards, gift vouchers, and promotions. Support custom styling, color, logo…轻松为礼品卡、代金券与促销活动创建自定义二维码。支持自定义样式、颜色与 Logo 等。

41Design and UI设计与界面33▾

Beste↗

A composition-first website builder based on shadcn/ui blocks. The free plan lets you connect your own custom domain, and includes unlimited pages, multi-language support, blog, forms, and hosting.基于 shadcn/ui 区块、以组合为优先的网站构建器。免费计划可绑定自有域名，含无限页面、多语言支持、博客、表单与托管。

BoxySVG↗

A free installable Web app for drawing SVGs and exporting in SVG, PNG, jpeg, and other formats.免费的免安装 Web 应用，可绘制 SVG 并导出为 SVG、PNG、JPEG 等格式。

BrandIcons↗

Favicon API. AI-based discovery for domains without icons or even without web servers. Free tier includes 500,000 requests per month with attribution.Favicon API。对没有图标甚至没有 Web 服务器的域名提供基于 AI 的发现能力。免费套餐含每月 500,000 次请求（需标注来源）。

Calendar Icons Generator↗

Generate an entire year’s worth of unique icons in a single click, absolutely FREE一键生成够用一整年的独特图标，完全免费

Canva↗

Free online design tool to create visual content.免费在线设计工具，用于创建视觉内容。

CodedThemes↗

Offers a well-crafted admin dashboard & and UI kits designed to simplify and speed up modern web development.提供精心打造的管理后台与 UI 套件，旨在简化并加速现代 Web 开发。

Excalidraw↗

A free online drawing document web page with free save to local and export support.免费的在线绘图文档网页，支持免费保存到本地与导出。

figma.com↗

Online, collaborative design tool for teams; free tier includes unlimited files and viewers with a max of 2 editors and three projects.面向团队的在线协作设计工具；免费套餐含不限文件与查看者，最多 2 名编辑者与 3 个项目。

Flows↗

A fully customizable product adoption platform for building onboarding and user engagement experiences. Free for up to 250 monthly tracked users.完全可定制的产品采纳平台，用于打造新手引导与用户互动体验。免费支持每月最多 250 名跟踪用户。

JoyDemo↗

Create interactive and clickable demos of your website or app. Free with unlimited demos and unlimited views.为你的网站或应用创建可交互、可点击的演示。免费且不限演示数与浏览量。

landen.co↗

Generate, edit, and publish beautiful websites and landing pages for your startup. All without code. The free tier allows you to have one website, fully customizable and published on the web.为你的初创项目生成、编辑并发布精美的网站与落地页，全程无需写代码。免费套餐允许 1 个网站，可完全自定义并发布到网上。

lensdump.com↗

Free cloud image hosting.免费的云端图床。

Logo.dev↗

Company logo API with 44M+ brands that’s as easy as calling a URL. First 10,000 API calls are free.公司 Logo API，覆盖 4,400 万以上品牌，调用方式如同打开一个 URL。前 10,000 次 API 调用免费。

marvelapp.com↗

Design, prototyping, and collaboration, free plan limited to one user and project.设计、原型与协作，免费计划限 1 名用户与 1 个项目。

Mindmup.com↗

Unlimited mind maps for free and store them in the cloud. Your mind maps are available everywhere, instantly, from any device.免费创建不限量的思维导图并存储在云端。你的思维导图可在任意设备上即时访问。

Mockplus iDoc↗

Mockplus iDoc is a powerful design collaboration & handoff tool. Free Plan includes three users and five projects with all features available.Mockplus iDoc 是强大的设计协作与交付工具。免费计划含 3 名用户与 5 个项目，且所有功能可用。

photopea.com↗

A Free, Advanced online design editor with Adobe Photoshop UI supporting PSD, XCF & Sketch formats (Adobe Photoshop, Gimp and Sketch App).免费的进阶在线设计编辑器，采用 Adobe Photoshop 界面，支持 PSD、XCF 与 Sketch 格式（Adobe Photoshop、Gimp 与 Sketch App）。

Plasmic↗

A fast, easy-to-use, robust web design tool and page builder that integrates into your codebase. Build responsive pages or complex components; optionally extend with code; and publish to production sites and apps.快速、易用且稳健的网页设计与页面构建工具，可集成进代码库。构建响应式页面或复杂组件，可选代码扩展，并发布到生产站点与应用。

Proto.io↗

Create fully interactive UI prototypes without coding. The free tier is available when the free trial ends. The free tier includes one user, one project, five prototypes, 100MB of online storage, and a preview of the proto.io app.无需编码即可创建完全可交互的 UI 原型。免费试用结束后可使用免费套餐，含 1 名用户、1 个项目、5 个原型、100 MB 在线存储与 proto.io 应用预览。

Quant Ux↗

Quant Ux is a prototyping and design tool. – It’s completely free and also open source.Quant Ux 是原型与设计工具。完全免费且开源。

Shadcn Studio↗

Preview your theme changes across different components and layouts.在不同组件与布局中预览主题变更。

smartmockups.com↗

Create product mockups, 200 free mockups.创建产品样机图，免费 200 张。

SVGicons.com↗

Free search engine for 312K+ open-source SVG icons with ready-to-use SVG, React, Vue, HTML, and CSS code.免费搜索引擎，覆盖 312,000 多个开源 SVG 图标，并提供可直接使用的 SVG、React、Vue、HTML 与 CSS 代码。

TeleportHQ↗

Low-code Front-end Design & Development Platform. TeleportHQ is the collaborative front-end platform to instantly create and publish headless static websites. Three free projects, unlimited collaborators, and free code export.低代码前端设计与开发平台。TeleportHQ 是协作式前端平台，可即时创建并发布无头静态网站。3 个免费项目、不限协作者与免费代码导出。

Unicorn Platform↗

Effortless landing page builder with hosting. One website for free.轻松的落地页构建器，含托管。免费 1 个网站。

Updrafts.app↗

WYSIWYG website builder for tailwindcss-based designs. Free for non-commercial usage.面向基于 tailwindcss 设计的所见即所得网站构建器。非商业用途免费。

Webflow↗

WYSIWYG website builder with animations and website hosting. Free for two projects.带动画与网站托管的所见即所得网站构建器。2 个项目免费。

Webstudio↗

Open-source alternative to Webflow. The free plan offers unlimited websites on their domain. Five websites with custom domains. Ten thousand page views/month. 2 GB asset storage.Webflow 的开源替代品。免费计划可在其域名下建不限量网站，含 5 个支持自定义域名的网站，每月 1 万次页面浏览，2 GB 素材存储。

whimsical.com↗

Collaborative flowcharts, wireframes, sticky notes and mind maps. Create up to 4 free boards.协作式流程图、线框图、便签与思维导图。最多可创建 4 个免费画板。

Zeplin↗

Designer and developer collaboration platform. Show designs, assets, and style guides. Free for one project.设计师与开发者协作平台。可展示设计、素材与样式指南。1 个项目免费。

WrapPixel↗

Download High Quality Free and Premium Admin dashboard template created with Angular, React, VueJs, NextJS, and NuxtJS! HTML Themes and UI Kits to create your applications faster!下载高质量免费与高级管理后台模板，涵盖 Angular、React、VueJs、NextJS 与 NuxtJS！用 HTML 主题与 UI 套件更快构建你的应用。

Themeselection↗

Selected high quality, modern design, professional and easy-to-use Free Admin Dashboard Template,精选的高质量、现代设计、专业且易用的免费管理后台模板

AdminMart↗

High-Quality Free and Premium Admin Dashboard and Website Templates created with Angular, Bootstrap, React, VueJs, NextJS, and NuxtJS!用 Angular、Bootstrap、React、VueJs、NextJS 与 NuxtJS 打造的高质量免费与高级管理后台及网站模板！

42Data Visualization on Maps地图数据可视化22▾

Clockwork Micro↗

Map tools that work like clockwork. Fifty thousand free monthly queries (map tiles, db2vector, elevation).像钟表一样精准运转的地图工具。每月 5 万次免费查询（地图瓦片、db2vector、高程）。

Foursquare↗

Location discovery, venue search, and context-aware content from Places API and Pilgrim SDK.来自 Places API 与 Pilgrim SDK 的位置发现、场所搜索与情境感知内容。

geoapify.com↗

Vector and raster map tiles, geocoding, places, routing, isolines APIs. Three thousand free requests/day.矢量与栅格地图瓦片、地理编码、地点、路径规划、等值线 API。每天 3000 次免费请求。

geocod.io↗

Geocoding via API or CSV Upload. Two thousand five hundred free queries/day.通过 API 或上传 CSV 进行地理编码。每天 2,500 次免费查询。

geocodify.com↗

Geocoding and Geoparsing via API or CSV Upload. 10k free queries/month.通过 API 或上传 CSV 进行地理编码与地理解析。每月 1 万次免费查询。

geojs.io↗

Highly available REST/JSON/JSONP IP Geolocation lookup API.高可用的 REST、JSON、JSONP IP 地理定位查询 API。

Geokeo api↗

Geocoding API with language correction and more. Worldwide coverage. 2,500 free daily queries具备语言纠正等能力的地理编码 API。全球覆盖。每天 2,500 次免费查询

graphhopper.com↗

A free developer package is offered for Routing, Route Optimization, Distance Matrix, Geocoding, and Map Matching.免费开发者套餐，覆盖路径规划、路线优化、距离矩阵、地理编码与地图匹配。

here↗

APIs and SDKs for maps and location-aware apps. 250k transactions/month for free.面向地图与位置感知应用的 API 与 SDK。每月 25 万次事务免费。

IP Geolocation↗

Free DEVELOPER plan available with 30K requests/month.提供免费 DEVELOPER 计划，每月 3 万次请求。

ipstack↗

Locate and identify Website Visitors by IP Address通过 IP 地址定位并识别网站访客

LatLng↗

Geocoding, reverse geocoding, places, static maps, and vector map tiles APIs. Free tier includes 3,000 geocoding requests/day, 300 reverse geocoding requests/day, and 100 static map images/day.地理编码、逆地理编码、地点、静态地图与矢量地图瓦片 API。免费套餐含每天 3,000 次地理编码、300 次逆地理编码与 100 张静态地图图片。

locationiq.com↗

Geocoding, Maps, and Routing APIs. Five thousand requests/day for free.地理编码、地图与路径规划 API。每天 5,000 次免费请求。

mapbox.com↗

Maps, geospatial services and SDKs for displaying map data.用于展示地图数据的地图、地理空间服务与 SDK。

maps.stamen.com↗

Free map tiles and tile hosting.免费地图瓦片与瓦片托管。

maptiler.com↗

Vector maps, map services and SDKs for map visualization. Free vector tiles with weekly updates and four map styles.矢量地图、地图服务与用于地图可视化的 SDK。免费矢量瓦片每周更新，提供四种地图样式。

nominatim.org↗

OpenStreetMap’s free geocoding service, providing global address search functionality and reverse geocoding capabilities.OpenStreetMap 的免费地理编码服务，提供全球地址搜索与逆地理编码能力。

opencagedata.com↗

Geocoding API aggregating OpenStreetMap and other open geo sources. Two thousand five hundred free queries/day.聚合 OpenStreetMap 与其他开放地理数据源的地理编码 API。每天 2,500 次免费查询。

osmnames↗

Geocoding, search results ranked by the popularity of related Wikipedia page.地理编码，搜索结果按关联维基百科页面的热度排序。

positionstack↗

Free geocoding for global places and coordinates. 25,000 Requests per month for personal use.免费的地理编码，覆盖全球地点与坐标。个人使用每月 25,000 次请求。

stadiamaps.com↗

Map tiles, routing, navigation, and other geospatial APIs. Two thousand five hundred free map views and API requests/day for non-commercial usage and testing.地图瓦片、路径规划、导航与其他地理空间 API。非商业使用与测试每天 2,500 次免费地图浏览与 API 请求。

SqlInt↗

In-browser SQL workspace with free tools including a JOIN visualizer, SQL formatter, CSV/JSON to SQL converters, and practice questions with no account or credit card required.浏览器内 SQL 工作区，含 JOIN 可视化、SQL 格式化、CSV 与 JSON 转 SQL 工具与练习题等免费功能，无需账号或信用卡。

43Package Build System软件打包与构建3▾

build.opensuse.org↗

Package build service for multiple distros (SUSE, EL, Fedora, Debian, etc.).面向多个发行版（SUSE、EL、Fedora、Debian 等）的软件包构建服务。

copr.fedorainfracloud.org↗

Mock-based RPM build service for Fedora and EL.面向 Fedora 与 EL 的基于 mock 的 RPM 构建服务。

help.launchpad.net↗

Ubuntu and Debian build service.Ubuntu 与 Debian 构建服务。

44IDE and Code EditingIDE 与代码编辑40▾

Android Studio↗

Android Studio provides the fastest tools for building apps on every type of Android device. Open Source IDE is free for everyone and the best Android app development. Available for Windows, Mac, Linux, and even ChromeOS!Android Studio 提供面向各类 Android 设备构建应用的最快工具。这款开源 IDE 对所有人免费，也是最佳的 Android 应用开发工具。支持 Windows、Mac、Linux，甚至 ChromeOS。

Apache Netbeans↗

Development Environment, Tooling Platform and Application Framework.开发环境、工具平台与应用框架。

apiary.io↗

Collaborative design API with instant API mock and generated documentation (Free for unlimited API blueprints and unlimited users with one admin account and hosted documentation).协作式设计 API，可即时生成 API Mock 与文档（不限 API 蓝图与用户免费，含 1 个管理员账号与托管文档）。

BBEdit↗

BBEdit is a popular and extensible editor for macOS. Free Mode provides a powerful core feature set and an upgrade path to advanced features.BBEdit 是 macOS 上广受欢迎且可扩展的编辑器。免费模式提供强大的核心功能集，并可升级到高级功能。

Binder↗

Turn a Git repo into a collection of interactive notebooks. It is a free public service.把 Git 仓库变成一组交互式笔记本。这是一项免费的公共服务。

BlueJ↗

A free Java Development Environment designed for beginners, used by millions worldwide. Powered by Oracle & simple GUI to help beginners.面向初学者的免费 Java 开发环境，全球数百万人在用。由 Oracle 提供支持，界面简单，便于初学者上手。

Brackets↗

Brackets is an open-source text editor specifically designed for web development. It is lightweight, easy to use, and highly customizable.Brackets 是专为 Web 开发设计的开源文本编辑器。轻量、易用且高度可定制。

cacher.io↗

Code snippet organizer with labels and support for 100+ programming languages.代码片段管理器，支持标签并覆盖 100 多种编程语言。

cocalc.com↗

Collaborative calculation in the cloud. Browser access to full Ubuntu with built-in collaboration and lots of free software for mathematics, science, data science, preinstalled: Python, LaTeX, Jupyter Notebooks, SageMath, scikitlearn, etc.云端协作计算。可在浏览器中访问完整的 Ubuntu，内置协作能力与大量数学、科学、数据科学免费软件，预装 Python、LaTeX、Jupyter Notebooks、SageMath、scikit-learn 等。

Code::Blocks↗

Free Fortran & C/C++ IDE. Open Source and runs on Windows,macOS & Linux.免费的 Fortran 与 C/C++ IDE。开源，可在 Windows、macOS 与 Linux 上运行。

Codeground↗

Free browser IDE and playgrounds for 15+ languages plus Postgres, MySQL, MongoDB, and Redis. Shareable snippets, coding interviews, and cloud workspaces. Free playgrounds need no install.免费的浏览器 IDE 与演练场，支持 15 种以上语言以及 Postgres、MySQL、MongoDB 与 Redis。可分享代码片段，支持编程面试与云工作区。免费演练场无需安装。

codiga.io↗

Coding Assistant that lets you search, define, and reuse code snippets directly in your IDE. Free for individual and small organizations.编程助手，可直接在 IDE 中搜索、定义并复用代码片段。个人与小型组织免费。

Components.studio↗

Code components in isolation, visualize them in stories, test them, and publish them on npm.以独立方式开发代码组件，用 story 可视化、测试并发布到 npm。

Eclipse Che↗

Web-based and Kubernetes-Native IDE for Developer Teams with multi-language support. Open Source and community-driven. An online instance hosted by Red Hat is available at workspaces.openshift.com.面向开发者团队的基于 Web 且 Kubernetes 原生的 IDE，支持多语言。开源且由社区驱动。Red Hat 托管的在线实例见 workspaces.openshift.com。

ForgeCode↗

AI-enabled pair programmer for Claude, GPT4 Series, Grok, Deepseek, Gemini and all frontier models. Works natively with your CLI and integrates seamlessly with any IDE. Free tier includes basic AI model access with local processing.面向 Claude、GPT4 系列、Grok、Deepseek、Gemini 及全部前沿模型的 AI 结对编程助手。原生适配你的 CLI，并可无缝集成任意 IDE。免费套餐含基础模型访问与本地处理。

GetVM↗

Instant free Linux and IDEs chrome sidebar. The free tier includes 5 VMs per day.即时的免费 Linux 与 IDE Chrome 侧边栏。免费套餐每天含 5 台虚拟机。

JDoodle↗

Online compiler and editor for more than 60 programming languages with a free plan for REST API code compiling up to 200 credits per day.面向 60 多种编程语言的在线编译器与编辑器，免费计划支持 REST API 代码编译，每天最多 200 额度。

jetbrains.com↗

Productivity tools, IDEs and deploy tools (aka IntelliJ IDEA, PyCharm, etc). Free license for students, teachers, Open Source and user groups.生产力工具、IDE 与部署工具（即 IntelliJ IDEA、PyCharm 等）。对学生、教师、开源项目与用户组提供免费许可。

JSONPlaceholder↗

Some REST API endpoints that return some fake data in JSON format. The source code is also available if you would like to run the server locally.一些以 JSON 格式返回假数据的 REST API 端点。若想在本地运行服务，也提供源码。

Lazarus↗

Lazarus is a Delphi-compatible cross-platform IDE for Rapid Application Development.Lazarus 是兼容 Delphi 的跨平台 IDE，用于快速应用开发。

LiveCodes↗

An open-source client-side code playground that supports 90+ languages/frameworks. Projects can be saved, exported, shared, synced, deployed (to GitHub Pages) and embedded in web pages. Mobile-friendly. Can be self-hosted. Free for unlimited usage. No account required.开源客户端代码演练场，支持 90 多种语言与框架。项目可保存、导出、分享、同步、部署（到 GitHub Pages）并嵌入网页。移动端友好，可自托管，免费不限量，无需账号。

MarsCode↗

A free AI-powered cloud-based IDE.免费且由 AI 驱动的云端 IDE。

micro-jaymock↗

Tiny API mocking microservice for generating fake JSON data.用于生成假 JSON 数据的微型 API 模拟微服务。

mockaroo↗

Mockaroo lets you generate realistic test data in CSV, JSON, SQL, and Excel formats. You can also create mocks for back-end API.Mockaroo 让你生成 CSV、JSON、SQL 与 Excel 格式的拟真测试数据。也可为后端 API 创建 mock。

Mocklets↗

an HTTP-based mock API simulator that helps simulate APIs for faster parallel development and more comprehensive testing, with a lifetime free tier.基于 HTTP 的模拟 API 仿真器，帮助模拟 API 以实现更快的并行开发与更全面的测试，提供终身免费档。

OneCompiler↗

Free online compiler supporting 70+ languages including Java, Python, C++, JavaScript.免费在线编译器，支持 Java、Python、C++、JavaScript 等 70 多种语言。

OnlineGDB↗

A free online ide thats supports 40+ languages and is pre installed with tons of libraries; and also has a debugging option, flags, tutorials, and a QNA page!免费的在线 IDE，支持 40 多种语言并预装大量库；还提供调试选项、编译标志、教程与问答页面。

pterocos↗

a free opensource browser-based coding environment for front-end developers. write html, css and js with a vs code-grade editor (monaco), live preview, scss/typeScript/babel support, and an ai chat assistant for debugging and suggestions. all projects save to local storage. free forever – no account needed.面向前端开发者的免费开源浏览器端编程环境。用 VS Code 级编辑器（monaco）编写 html、css 与 js，支持实时预览、scss/typeScript/babel，并内置用于调试与建议的 AI 对话助手。所有项目保存在本地存储中。永久免费 —— 无需账号。

Paiza↗

Develop Web apps in Browser without needing to set up anything. Free Plan offers one server with 24 24-hour lifetime and 4 hours of running time per day with 2 CPU cores, 2 GB RAM, and 1 GB storage.在浏览器中开发 Web 应用，无需任何环境搭建。免费计划提供 1 台服务器，24 小时生命周期、每天 4 小时运行时长，配 2 个 CPU 核心、2 GB 内存与 1 GB 存储。

PHPSandbox↗

Online development environment for PHP面向 PHP 的在线开发环境

Replit↗

A cloud coding environment for various program languages.支持多种编程语言的云端编码环境。

RunMat↗

GPU-accelerated numerical computing IDE in the browser. Write and run MATLAB-syntax .m files with automatic GPU acceleration via WebAssembly and WebGPU. No install, no account, no license fees. Open source runtime with CLI, NPM package, and Jupyter kernel support.浏览器中 GPU 加速的数值计算 IDE。可编写并运行 MATLAB 语法的 .m 文件，并通过 WebAssembly 与 WebGPU 自动获得 GPU 加速。无需安装、无需账号、无授权费用。开源运行时，支持 CLI、NPM 包与 Jupyter 内核。

SoloLearn↗

A cloud programming playground well-suited for running code snippets. Supports various programming languages. No registration is required for running code, but it is necessary when saving code on their platform. Also offers free courses for beginners and intermediate-level coders.适合运行代码片段的云端编程演练场，支持多种编程语言。运行代码无需注册，但在平台上保存代码需要账号。还为初学者与中级开发者提供免费课程。

stackblitz.com↗

Online/Cloud Code IDE to create, edit, & deploy full-stack apps. Support any popular NodeJs-based frontend & backend frameworks. Shortlink to create a new project: https://node.new.在线与云端代码 IDE，可创建、编辑并部署全栈应用。支持任意流行的基于 NodeJS 的前端与后端框架。创建新项目的短链：https://node.new。

Sublime Text↗

Sublime Text is a popular, versatile, and highly customizable text editor used for coding and text editing tasks.Sublime Text 是广受欢迎、用途广泛且高度可定制的文本编辑器，用于编码与文本编辑任务。

Visual Studio Code↗

Code editor redefined and optimized for building and debugging modern web and cloud applications. Developed by Microsoft.重新定义并优化的代码编辑器，专为构建与调试现代 Web 与云应用而生。由 Microsoft 开发。

Visual Studio Community↗

Fully-featured IDE with thousands of extensions, cross-platform app development (Microsoft extensions available for download for iOS and Android), desktop, web and cloud development, multi-language support (C#, C++, JavaScript, Python, PHP and more).功能齐全的 IDE，拥有数千个扩展，支持跨平台应用开发（可下载 Microsoft 提供的 iOS 与 Android 扩展）、桌面、Web 与云开发，以及多语言支持（C#、C++、JavaScript、Python、PHP 等）。

VSCodium↗

Community-driven, without telemetry/tracking, and freely-licensed binary distribution of Microsoft’s editor VSCode社区驱动、无遥测与追踪、自由许可的 Microsoft 编辑器 VSCode 二进制分发版

wakatime.com↗

Quantified self-metrics about your coding activity using text editor plugins, limited plan for free.通过文本编辑器插件量化你的编码活动自指标，提供有限的免费计划。

Wave Terminal↗

Wave is an open-source, cross-platform terminal for seamless workflows. Render anything inline. Save sessions and history. Powered by open web standards. MacOS and Linux.Wave 是一个开源、跨平台的终端，助力无缝工作流。可在行内渲染任何内容，保存会话与历史。由开放 Web 标准驱动。支持 MacOS 与 Linux。

45Analytics, Events and Statistics分析、事件与统计36▾

amplitude.com↗

1 million monthly events, up to 2 apps每月 100 万条事件，最多 2 个应用

AppFit↗

AppFit is a comprehensive analytics and product management tool designed to facilitate seamless, cross-platform management of analytics and product updates. Free plan includes 10,000 events per month, product journal and weekly insights.AppFit 是集分析与产品管理于一体的工具，便于跨平台无缝管理分析与产品更新。免费计划含每月 10,000 条事件、产品日志与每周洞察。

Aptabase↗

Open Source, Privacy-Friendly, and Simple Analytics for Mobile and Desktop Apps. SDKs for Swift, Kotlin, React Native, Flutter, Electron, and many others. Free for up to 20,000 events per month.面向移动与桌面应用的开源、隐私友好且简单的分析工具。提供 Swift、Kotlin、React Native、Flutter、Electron 等 SDK。每月最多 20,000 条事件免费。

Avo↗

Simplified analytics release workflow. Single-source-of-truth tracking plan, type-safe analytics tracking library, in-app debuggers, and data observability to catch all data issues before you release. Free for two workspace members and 1 hour data observability lookback.简化的分析发布工作流。单一可信来源的跟踪计划、类型安全的分析跟踪库、应用内调试器与数据可观测能力，让你在发布前发现所有数据问题。2 名工作区成员与 1 小时数据可观测回溯免费。

Beampipe.io↗

Beampipe is simple, privacy-focussed web analytics. free for up to 5 domains & 10k monthly page views.Beampipe 是简单、注重隐私的网站分析。最多 5 个域名与每月 1 万次页面浏览免费。

Census↗

Reverse ETL & Operational Analytics Platform. Sync 10 fields from your data warehouse to 60+ SaaS like Salesforce, Zendesk, or Amplitude.反向 ETL 与运营分析平台。把数据仓库中的 10 个字段同步到 Salesforce、Zendesk、Amplitude 等 60 多个 SaaS。

Clicky↗

Website Analytics Platform. Free Plan for one website with 3000 views analytics.网站分析平台。免费方案支持 1 个网站、3000 次浏览分析。

counter.dev↗

Web analytics made simple and therefore privacy friendly. Free or pay what you want by donation.简单因而隐私友好的网站分析。免费使用，或按你意愿捐赠付费。

DevDome↗

Cookieless web analytics for WordPress that counts human visitors separately from bots and AI crawlers. Free plan: unlimited sites, 50,000 human pageviews per month, 90 days of data retention.面向 WordPress 的无 Cookie 网站分析，把真人访客与机器人及 AI 爬虫分开计数。免费计划：不限站点、每月 50,000 真人页面浏览、数据保留 90 天。

DocBeacon↗

Secure document sharing with document tracking and engagement Analytics. Free plan supports up to 20 PDF documents (10 MB max), 10 contacts, and 2 shares per document with basic analytics for views downloads, time and engagement.带文档跟踪与参与度分析的安全文档分享。免费计划支持最多 20 份 PDF 文档（单份最大 10 MB）、10 个联系人与每份文档 2 次分享，并提供浏览、下载、时长与参与度的基础分析。

Dwh.dev↗

Data Cloud Observability Solution (Snowflake). Free for personal use.数据云可观测方案（Snowflake）。个人使用免费。

Expensify↗

Expense reporting, free personal reporting approval workflow费用报销，免费的个人报销审批流

getinsights.io↗

Privacy-focused, cookie-free analytics, free for up to 3k events/month.注重隐私、无 Cookie 的分析，每月最多 3,000 条事件免费。

Gizmo Analytics↗

Simple analytics for people managing lots of sites. Install manually or let Claude/Cursor do it for you. Free for up to 10k events/month.面向管理大量站点的人的简单分析工具。可手动安装，或让 Claude 与 Cursor 代劳。每月最多 1 万条事件免费。

GoatCounter↗

GoatCounter is an open-source web analytics platform available as a hosted service (free for non-commercial use) or self-hosted app. It aims to offer easy-to-use and meaningful privacy-friendly web analytics as an alternative to Google Analytics or Matomo. The free tier is for non-commercial use and includes unlimited sites, six months of data retention, and 100k pageviews/month.GoatCounter 是开源的网站分析平台，可作为托管服务（非商业使用免费）或自托管应用。它旨在提供易用、有意义且对隐私友好的网站分析，作为 Google Analytics 或 Matomo 的替代。免费套餐面向非商业使用，含不限站点、6 个月数据保留与每月 10 万次页面浏览。

Google Analytics↗

Google AnalyticsGoogle Analytics

heap.io↗

Automatically captures every user action in iOS or web apps. Free for up to 10K monthly sessions.自动捕获 iOS 或 Web 应用中的每一次用户操作。每月最多 1 万次会话免费。

Hightouch↗

Hightouch is a Reverse ETL platform that helps you sync customer data from your data warehouse to your CRM, marketing, and support tools. The free tier offers you one destination to sync data to.Hightouch 是反向 ETL 平台，帮助把客户数据从数据仓库同步到 CRM、营销与客服工具。免费套餐提供一个数据同步目标。

HitKeep↗

Privacy-focused, open-source web and product analytics platform with a free cloud plan for 3 websites, 3 team members, 60-day data retention, AI analytics, goals, funnels, events, and hits.注重隐私的开源 Web 与产品分析平台，提供免费云计划，含 3 个网站、3 名团队成员、60 天数据保留、AI 分析、目标、漏斗、事件与命中。

Hotjar↗

Website Analytics and Reports . Free Plan allows 2000 pageviews/day. One hundred snapshots/day (max capacity: 300). Three snapshot heatmaps can be stored for 365 days. Unlimited Team Members. Also in App and standalone surveys, feedback widgets with screenshots. Free tier allows creating 3 surveys & 3 feedback widgets and collecting 20 responses per month.网站分析与报告。免费方案支持每天 2000 次页面浏览，每天 100 张快照（最大容量 300 张），3 张快照热力图可保存 365 天，团队成员不限。还提供应用内与独立的问卷、带截图的反馈组件。免费档允许创建 3 份问卷与 3 个反馈组件，每月收集 20 份回复。

LogSpot↗

Full unified web and product analytics platform, including embeddable analytics widgets and automated robots (slack, telegram, and webhooks). Free plan includes 10,000 events per month.完整的统一 Web 与产品分析平台，含可嵌入的分析组件与自动化机器人（Slack、Telegram 与 Webhook）。免费计划每月 10,000 条事件。

Mixpanel↗

100,000 monthly tracked users, unlimited data history and seats, US or EU data residency每月 100,000 名跟踪用户，不限数据历史与席位，数据可存放于美国或欧盟

Moesif↗

API analytics for REST and GraphQL. (Free up to 500,000 API calls/mo)面向 REST 与 GraphQL 的 API 分析（每月最多 50 万次 API 调用免费）

PostHog↗

Full Product Analytics suite free for up to 1m tracked events per month. Also provides unlimited in-App Surveys with 250/month responses.完整的产品分析套件，每月最多 100 万跟踪事件免费。还提供不限量的应用内问卷，每月 250 条回复。

Repohistory↗

Beautiful dashboard for tracking GitHub repo traffic history longer than 14 days. Free Plan allows users to monitor traffic for a single repository.追踪 GitHub 仓库流量历史（超过 14 天）的精美仪表盘。免费计划可监控单个仓库的流量。

Row Zero↗

Blazingly fast, connected spreadsheet. Connect directly to data databases, S3, and APIs. Import, analyze, graph, and share millions of rows instantly. Three free (forever) workbooks.极快的在线电子表格。可直连数据库、S3 与 API。瞬时导入、分析、绘图并共享数百万行数据。提供 3 个永久免费工作簿。

Rybbit↗

Open-source and cookieless alternative to Google Analytics that is 10x more intuitive. Free plans has 3,000 monthly events.Google Analytics 的开源无 Cookie 替代品，直观程度提升 10 倍。免费计划每月 3,000 条事件。

Seline↗

Seline is a simple & private website and product analytics. Cookieless, lightweight, independent. Free plan includes 3,000 events per month and provides access to all our features, such as the dashboard, user journeys, funnels, and more.Seline 是简单且私密的网站与产品分析。无 Cookie、轻量、独立第三方。免费计划每月 3,000 条事件，并可使用仪表盘、用户旅程、漏斗等全部功能。

StatCounter↗

Website Viewer Analytics. Free plan for analytics of 500 most recent visitors.网站访客分析。免费方案可分析最近 500 名访客。

Stats4U↗

A visitor counter and web stats service operated from Poland, since 2006. Website owners choose a counter design copy the code and paste it into their site; no account is required. Free without paid plans. Privacy First: Stats4U does not set cookies and Counter data is processed on the operator’s own server in the EU.来自波兰的访客计数与网站统计服务，自 2006 年运营至今。站长选择计数器样式、复制代码粘贴到站点即可，无需账号，免费且无付费档位。隐私优先：Stats4U 不设置 Cookie，计数数据在运营商位于欧盟的服务器上处理。

Statsig↗

All-in-one platform spanning across analytics, feature flagging, and A/B testing. Free for up to 1m metered events per month.覆盖分析、功能开关与 A/B 测试的一体化平台。每月最多 100 万计费事件免费。

TraceLog↗

AI Analytics for E-commerce. Ask questions in natural language about your analytics, get actionable recommendations and grow your revenue with AI-powered insights. Free for up to 10k events per month.面向电商的 AI 分析。用自然语言提问你的分析数据，获得可执行建议，借助 AI 洞察提升营收。每月最多 1 万条事件免费。

Trackingplan↗

Automatically detect digital analytics, marketing data and pixels issues, maintain up-to-date tracking plans, and foster seamless collaboration. Deploy it to your production environment with real traffic or add analytics coverage to your regression tests without writing code.自动检测数字分析、营销数据与像素问题，维护最新的跟踪计划并促进无缝协作。可用真实流量部署到生产环境，也可在回归测试中加入分析覆盖而无需写代码。

TrackWith Dicloud↗

Free lightweight privacy-focused alternative to Google Analytics. Unlimited pageviews, unlimited visitor, unlimited page heatmaps & goal tracking. Free for up to 3 domains and 600 session replay per domain.免费、轻量、注重隐私的 Google Analytics 替代品。不限页面浏览、不限访客、不限页面热力图与目标跟踪。最多 3 个域名免费，每域名 600 次会话回放。

Umami↗

Simple, fast, privacy-focused, open-source alternative to Google Analytics.简单、快速、注重隐私的 Google Analytics 开源替代品。

usabilityhub.com↗

Test designs and mockups on real people and track visitors. Free for one user, unlimited tests用真实用户测试设计与原型稿并追踪访客。1 名用户免费，测试次数不限。

46Visitor Session Recording访客会话录制10▾

FullStory.com↗

1,000 sessions/month with one month data retention and three user seats. More information here.每月 1,000 次会话，数据保留一个月，含 3 个用户席位。详情见这里。

howuku.com↗

Track user interaction, engagement, and event. Free for up to 5,000 visits/month跟踪用户交互、参与度与事件。每月最多 5,000 次访问免费。

inspectlet.com↗

2,500 sessions/month free for one website每个网站每月 2,500 次免费会话

LogRocket.com↗

1,000 sessions/month with 30-day retention, error tracking, live mode每月 1,000 次会话，数据保留 30 天，含错误跟踪与实时模式

Microsoft Clarity↗

Session recording completely free with “no traffic limits”, no project limits, and no sampling会话录制完全免费，无流量限制、无项目限制且不做采样

mouseflow.com↗

500 sessions/month free for one website每个网站每月 500 次免费会话

OpenReplay.com↗

Open-source session replay with dev tools for bug reproduction, live session for real-time support, and product analytics suite. One thousand sessions/month with access to all features and 7-day retention.开源会话回放，含用于复现缺陷的开发工具、用于实时支持的实时会话与产品分析套件。每月 1,000 次会话，可使用全部功能，保留 7 天。

Reactflow.com↗

Per site: 1,000 pages views/day, three heatmaps, three widgets, free bug tracking每个站点：每天 1,000 次页面浏览、3 个热力图、3 个小部件与免费缺陷跟踪

smartlook.com↗

free packages for web and mobile apps (1500 sessions/month), three heatmaps, one funnel, 1-month data history面向 Web 与移动应用的免费套餐（每月 1500 个会话），3 张热力图、1 个漏斗、1 个月数据历史。

UXtweak.com↗

Record and watch how visitors use your website or app. Free unlimited time for small projects录制并观看访客如何使用你的网站或应用。小型项目免费不限时长

47International Mobile Number Verification API and SDK国际手机号验证 API 与 SDK2▾

numverify↗

Global phone number validation and lookup JSON API. 100 API requests/month全球手机号校验与查询 JSON API。每月 100 次 API 请求

veriphone↗

Global phone number verification in a free, fast, reliable JSON API. 1000 requests/month以免费、快速、可靠的 JSON API 提供全球手机号验证。每月 1,000 次请求

48Payment and Billing Integration支付与计费集成16▾

Adapty.io↗

One-stop solution with open-source SDK for mobile in-app subscription integration to iOS, Android, React Native, Flutter, Unity, or web app. Free up to $10k monthly revenue.一站式方案，提供开源 SDK，帮助移动端应用内订阅集成到 iOS、Android、React Native、Flutter、Unity 或 Web 应用。每月收入 1 万美元以内免费。

AllRatesToday↗

Real-time mid-market exchange rates for 150+ currencies with official JavaScript, Python, and PHP SDKs. Free tier includes 300 requests/month over HTTPS.覆盖 150 多种货币的实时中间市场汇率，提供官方 JavaScript、Python 与 PHP SDK。免费套餐每月 300 次 HTTPS 请求。

Churnkey↗

Cancel flows (open-sourced), churn metrics, and revenue analytics for subscription businesses. Free forever.面向订阅业务的挽留流程（已开源）、流失指标与收入分析。永久免费。

Currencyapi↗

Free currency conversion and exchange rate data API. Free 300 requests per month, 10 requests per minute for private use.免费货币转换与汇率数据 API。私人使用每月免费 300 次请求，每分钟 10 次。

CurrencyApi↗

Live Currency Rates for Physical and Cryptocurrencies, delivered in JSON and XML. The free tier offers 1,250 API requests/month.以 JSON 与 XML 提供的实物货币与加密货币实时汇率。免费套餐每月 1,250 次 API 请求。

CurrencyFreaks↗

Provides current and historical currency exchange rates. Free DEVELOPER plan available with 1000 requests/month.提供当前与历史货币汇率。提供免费 DEVELOPER 计划，每月 1,000 次请求。

currencylayer↗

Reliable Exchange Rates and Currency Conversion for your Business, 100 API requests/month free.为你的业务提供可靠的汇率与货币转换，每月 100 次 API 请求免费。

exchangerate-api.com↗

An easy-to-use currency conversion JSON API. The free tier updates once per day with a limit of 1,500 requests/month.易用的货币转换 JSON API。免费套餐每天更新一次，每月限 1,500 次请求。

Exchange Rate API↗

Real-time currency rates for 160+ currencies with 60-second updates and official SDKs. Free tier includes 300 requests/month.覆盖 160 多种货币的实时汇率，60 秒更新，提供官方 SDK。免费套餐每月 300 次请求。

FraudLabsPRO↗

Help merchants to prevent payment fraud and chargebacks. Free Micro Plan available with 500 queries/month.帮助商户防范支付欺诈与拒付。提供每月 500 次查询的免费微型计划。

FxRatesAPI↗

Provides real-time and historical exchange rates. The free tier requires attribution.提供实时与历史汇率。免费套餐需标注来源。

Moesif API Monetization↗

Generate revenue from APIs via usage-based billing. Connect to Stripe, Chargebee, etc. The free tier offers 30,000 events/month.通过按量计费让 API 产生收入。可连接 Stripe、Chargebee 等。免费套餐每月 3 万条事件。

ParityVend↗

Automatically adjust pricing based on visitor location to expand your business globally and reach new markets (purchasing power parity). The free plan includes 7,500 API requests/month.根据访客所在地自动调整定价，助你拓展全球业务、触达新市场（购买力平价）。免费计划含每月 7,500 次 API 请求。

Qonversion↗

All-in-one cross-platform subscription management platform offering analytics, A/B testing, Apple Search Ads, remote configs, and growth tools for optimizing in-app purchases and monetization. Compatible with iOS, Android, React Native, Flutter, Unity, Cordova, Stripe, and web. Free up to $10k in monthly tracked revenue.一体化跨平台订阅管理平台，提供分析、A/B 测试、Apple Search Ads、远程配置与增长工具，用于优化应用内购买与变现。兼容 iOS、Android、React Native、Flutter、Unity、Cordova、Stripe 与 Web。每月跟踪收入 1 万美元以内免费。

RevenueCat↗

Hosted backend for in-app purchases and subscriptions (iOS and Android). Free up to $2.5k/mo in tracked revenue.面向应用内购买与订阅（iOS 与 Android）的托管后端。每月跟踪收入 2,500 美元以内免费。

vatlayer↗

Instant VAT number validation and EU VAT rates API, free 100 API requests/month即时增值税号校验与欧盟增值税税率 API，每月免费 100 次 API 请求

49Docker RelatedDocker 相关5▾

Appish↗

Host Docker containers for demos with just a docker push. Free tier includes 1 slot with 2-hour sessions.用一条 docker push 托管用于演示的 Docker 容器。免费套餐含 1 个槽位与 2 小时会话。

Container Registry Service↗

Harbor based Container Management Solution. The free tier offers 1 GB of storage for private repositories.基于 Harbor 的容器管理方案。免费套餐为私有仓库提供 1 GB 存储。

Docker Hub↗

One free private repository and unlimited public repositories to build and store Docker images1 个免费私有仓库与不限公开仓库，用于构建并存储 Docker 镜像

quay.io↗

Build and store container images with unlimited free public repositories构建并存储容器镜像，公开仓库不限量且免费

ttl.sh↗

Anonymous & ephemeral Docker image registry匿名且临时的 Docker 镜像仓库

50Dev Blogging Sites开发者博客平台6▾

AyeDot↗

Share your ideas, knowledge, and stories with the world for Free in the form of Modern multimedia short-format Miniblogs.用现代多媒体短格式 Miniblog 的形式，免费与世界分享你的想法、知识与故事。

BearBlog↗

Minimalist, Markdown-powered blog and website builder.极简、由 Markdown 驱动的博客与网站构建器。

Dev.to↗

Where programmers share ideas and help each other grow.程序员分享想法、彼此成长的地方。

Hashnode↗

Hassle-free Blogging Software for Developers!.面向开发者的无痛博客软件！

Medium↗

Get more thoughtful about what matters to you.对你真正在意的事更有思考。

JustBlogged↗

Free blogging platform with custom domain support, and fast global performance.免费博客平台，支持自定义域名与快速的全球访问性能。

51Commenting Platforms评论系统4▾

GraphComment↗

GraphComment is a comments platform that helps you build an active community from the website’s audience.GraphComment 是评论平台，帮助网站从自身受众中培育活跃社区。

IntenseDebate↗

A feature-rich comment system for WordPress, Tumblr, Blogger, and many other website platforms.功能丰富的评论系统，支持 WordPress、Tumblr、Blogger 及许多其他网站平台。

Remarkbox↗

Open source hosted comments platform, pay what you can for “One moderator on a few domains with complete control over behavior & appearance”开源托管评论平台，按能力付费即可获得「少数域名上的 1 名管理员，并完全控制行为与外观」

Utterances↗

A lightweight comments widget built on GitHub issues. Use GitHub issues for blog comments, wiki pages, and more!基于 GitHub Issues 的轻量评论组件。可用 GitHub Issues 实现博客评论、Wiki 页面等。

52Screenshot APIs网页截图 API11▾

ApiFlash↗

A screenshot API based on Aws Lambda and Chrome. Handles full page, captures timing, and viewport dimensions.基于 AWS Lambda 与 Chrome 的截图 API。支持整页截图，可设置截图时机与视口尺寸。

microlink.io↗

It turns any website into data such as metatags normalization, beauty link previews, scraping capabilities, or screenshots as a service. 50 requests/day every day free.把任意网站转成数据，例如元标签规范化、精美链接预览、抓取能力或截图即服务。每天 50 次请求，天天免费。

PhantomJsCloud↗

Browser automation and page rendering. Free Tier offers up to 500 pages/day. Free Tier since 2017.浏览器自动化与页面渲染。免费套餐每天最多 500 页。自 2017 年起提供免费套餐。

Ironfang Render↗

UK-based screenshot, PDF, image, QR code and clip rendering API with reusable templates and signed URLs. 250 free renders a month with no payment details needed to get started.位于英国的截图、PDF、图片、二维码与片段渲染 API，支持可复用模板与签名 URL。每月 250 次免费渲染，上手无需填写支付信息。

screenshotbase.com↗

300 free screenshots / month. Take screenshots from any url. Fast, free & scalable.每月 300 张免费截图。可为任意网址截图，快速、免费且可扩展。

screenshotlayer.com↗

Capture highly customizable snapshots of any website. Free 100 snapshots/month捕获任意网站的高可定制快照。每月免费 100 张

screenshotmachine.com↗

Capture 100 snapshots/month, png, gif and jpg, including full-length captures, not only home page每月 100 张快照，支持 png、gif 与 jpg，含整页捕获而非仅首页

Screenshot Scout↗

Screenshot API for developers. Clean, production-ready screenshots from any URL in one request. Free plan includes 200 screenshots per month, forever.面向开发者的截图 API。一次请求即可从任意 URL 获得干净、可上线的截图。免费计划每月 200 张截图，永久有效。

Shotpipe↗

Screenshot and Open Graph image API built for static sites. Free tier includes 100 renders/month, no card required. cached renders are free.为静态站点打造的截图与 Open Graph 图片 API。免费套餐每月 100 次渲染，无需信用卡。命中缓存的渲染免费。

SnapAPI↗

Screenshot, video recording, PDF generation, and web data extraction API. Free plan includes 200 screenshots/month.截图、录屏、PDF 生成与网页数据抽取 API。免费计划每月 200 张截图。

thumbnail.ws↗

API for generating thumbnails of websites. Free 1,000 requests/month.生成网站缩略图的 API。每月免费 1,000 次请求。

53Flutter Related and Building IOS Apps without MacFlutter 与免 Mac 构建 iOS 应用3▾

CodeMagic↗

Codemagic is a fully hosted and managed CI/CD for mobile apps. You can build, test, and deploy with a GUI-based CI/CD tool. The free tier offers 500 free minutes/month and a Mac Mini instance with 2.3 GHz and 8 GB of RAM.Codemagic 是面向移动应用的完全托管 CI/CD。可用基于 GUI 的 CI/CD 工具构建、测试与部署。免费套餐每月 500 分钟，并提供 2.3 GHz、8 GB 内存的 Mac Mini 实例。

FlutLab↗

FlutLab is a modern Flutter online IDE and the best place to create, debug, and build cross-platform projects. Build iOS (Without a Mac) and Android apps with Flutter.FlutLab 是现代化的 Flutter 在线 IDE，也是创建、调试与构建跨平台项目的最佳场所。可用 Flutter 构建 iOS（无需 Mac）与 Android 应用。

FlutterFlow↗

FlutterFlow is a browser-based drag-and-drop interface to build mobile app using flutter.FlutterFlow 是基于浏览器的拖拽式界面，用于使用 Flutter 构建移动应用。

54Privacy Management隐私管理5▾

Bearer↗

Helps implement privacy by design via audits and continuous workflows so that organizations comply with GDPR and other regulations. The free tier is limited to smaller teams and the SaaS version only.通过审计与持续工作流帮助落实隐私即设计，使组织符合 GDPR 等法规。免费套餐仅限较小团队，且仅限 SaaS 版本。

Concord↗

Full data privacy platform, including consent management, privacy request handling (DSARs), and data mapping. Free tier includes core consent management features and they also provide a more advanced plan for free to verified open source projects.完整的数据隐私平台，包括同意管理、隐私请求处理（DSAR）与数据映射。免费套餐含核心同意管理功能，并为经认证的开源项目免费提供更高级的计划。

Cookiefirst↗

Cookie banners, auditing, and multi-language consent management solution. The free tier offers a one-time scan and a single banner.Cookie 横幅、审计与多语言同意管理方案。免费套餐含一次性扫描与单个横幅。

Iubenda↗

Privacy and cookie policies and consent management. The free tier offers limited privacy and cookie policy as well as cookie banners.隐私与 Cookie 政策及同意管理。免费套餐提供有限的隐私与 Cookie 政策以及 Cookie 横幅。

Ketch↗

Consent management and privacy framework tool. The free tier offers most features with a limited visitor count.同意管理与隐私框架工具。免费套餐提供大部分功能，但访客数量有限。

55Miscellaneous杂项25▾

BinShare.net↗

Create & share code or binaries. Available to share as a beautiful image e.g. for Twitter / Facebook post or as a link e.g. for chats or forums.创建并分享代码或二进制文件。可作为精美图片分享（如发 Twitter、Facebook），也可作为链接分享（如发聊天或论坛）。

Blynk↗

A SaaS with API to control, build & evaluate IoT devices. Free Developer Plan with 5 devices, Free Cloud & data storage. Mobile Apps are also available.提供 API 用于控制、构建与评估 IoT 设备的 SaaS。免费开发者计划含 5 台设备、免费云与数据存储，也提供移动端 App。

cron-job.org↗

Online cronjobs service. Unlimited jobs are free of charge.在线定时任务服务。任务不限量，免费使用。

Cronhooks↗

Schedule on-time or recurring webhooks. The free plan allows 5 ad-hoc schedules.定时或周期性地投递 Webhook。免费计划允许 5 个临时计划。

datelist.io↗

Online booking / appointment scheduling system. Free up to 5 bookings per month, includes 1 calendar在线预订与预约排期系统。每月最多 5 次预订免费，含 1 个日历

FOSSA↗

Scalable, end-to-end management for third-party code, license compliance and vulnerabilities.面向第三方代码的可扩展端到端管理，涵盖许可合规与漏洞。

Hook Relay↗

Add webhook support to your app without the hassles: done-for-you queueing, retries with backoff, and logging. The free plan has 100 deliveries per day, 14-day retention, and 3 hook endpoints.无需自建即可为应用加入 Webhook 支持：托管队列、带退避的重试与日志。免费计划每天 100 次投递、保留 14 天、3 个 Webhook 端点。

Hosting Checker↗

Check hosting information such as ASN, ISP, location and more for any domain, website or IP address. Also includes multiple hosting and DNS-related tools.查询任意域名、网站或 IP 的托管信息，如 ASN、ISP、位置等。还包含多种托管与 DNS 相关工具。

newreleases.io↗

Receive notifications on email, Slack, Telegram, Discord, and custom webhooks for new releases from GitHub, GitLab, Bitbucket, Python PyPI, Java Maven, Node.js NPM, Node.js Yarn, Ruby Gems, PHP Packagist, .NET NuGet, Rust Cargo and Docker Hub.通过邮件、Slack、Telegram、Discord 与自定义 Webhook 接收 GitHub、GitLab、Bitbucket、Python PyPI、Java Maven、Node.js NPM、Node.js Yarn、Ruby Gems、PHP Packagist、.NET NuGet、Rust Cargo 与 Docker Hub 的新版本发布通知。

PDFMonkey↗

Manage PDF templates in a dashboard, call the API with dynamic data, and download your PDF. Offers 300 free documents per month.在仪表盘管理 PDF 模板，用动态数据调用 API 并下载 PDF。每月提供 300 份免费文档。

Pika Code Screenshots↗

Create beautiful, customizable screenshots from code snippets and VSCode using the extension.通过扩展从代码片段与 VSCode 生成精美可定制的截图。

QuickType.io↗

Quickly auto-generate models/class/type/interface and serializers from JSON, schema, and GraphQL for working with data quickly & safely in any programming language. Convert JSON into gorgeous, typesafe code in any language.从 JSON、schema 与 GraphQL 快速自动生成模型、类、类型、接口与序列化器，以便用任意编程语言快速且安全地处理数据。把 JSON 转成任意语言下精美且类型安全的代码。

readme.com↗

Beautiful documentation made easy, free for Open Source.让精美文档变简单，对开源免费。

redirect.pizza↗

Easily manage redirects with HTTPS support. The free plan includes 10 sources and 100,000 hits per month.轻松管理重定向并支持 HTTPS。免费计划含 10 个来源与每月 10 万次命中。

redirection.io↗

SaaS tool for managing HTTP redirections for businesses, marketing and SEO.面向企业、营销与 SEO 的 HTTP 重定向管理 SaaS 工具。

redirs.com↗

Easy domain redirects with auto-SSL, analytics, and URL path forwarding. Free for basic use (up to 5 domains).带自动 SSL、分析与 URL 路径转发的简易域名重定向。基础使用免费（最多 5 个域名）。

RedirHub↗

API-first URL redirect infrastructure with custom nameservers, edge network, HTTPS, and proactive link monitoring. Free plan includes 2 hostnames, 100K requests per month, auto-SSL, path forwarding, and REST API access.API 优先的 URL 重定向基础设施，含自定义域名服务器、边缘网络、HTTPS 与主动链接监控。免费计划含 2 个主机名、每月 10 万次请求、自动 SSL、路径转发与 REST API 访问。

ReqBin↗

Post HTTP Requests Online. Popular Request Methods include GET, POST, PUT, DELETE, and HEAD. Supports Headers and Token Authentication. Includes a basic login system for saving your requests.在线发送 HTTP 请求。常用请求方法包括 GET、POST、PUT、DELETE 与 HEAD。支持请求头与 Token 认证。含基础登录系统以便保存请求。

Smartcar API↗

An API for cars to locate, get fuel tank, battery levels, odometer, unlock/lock doors, etc.面向汽车定位、获取油箱与电量、里程数、解锁与上锁车门等的 API。

Sunrise and Sunset↗

Get sunrise and sunset times for a given longitude and latitude.查询给定经纬度的日出与日落时间。

superfeedr.com↗

Real-time PubSubHubbub compliant feeds, export, analytics. Free with less customization符合 PubSubHubbub 的实时订阅源、导出与分析。免费但定制能力较弱

SurveyMonkey.com↗

Create online surveys. Analyze the results online. The free plan allows only 10 questions and 100 responses per survey.创建在线问卷并在线分析结果。免费计划每份问卷仅限 10 个问题与 100 条回复。

SYNCDATE↗

Two-way Google Calendar sync. Free tier: 2 accounts, unlimited events.双向 Google 日历同步。免费档：2 个账号，事件不限。

UUID Generator↗

Generate UUID v1, UUID v4, UUID v7, GUID, Nil UUIDs, CUID v1/v2, NanoID, and ULID instantly with enterprise-grade以企业级方式即时生成 UUID v1、UUID v4、UUID v7、GUID、Nil UUID、CUID v1 与 v2、NanoID 与 ULID

Versionfeeds↗

Custom RSS feeds for releases of your favorite software. Have the latest versions of your programming languages, libraries, or loved tools in one feed. (The first 3 feeds are free)为你喜爱软件的发布创建自定义 RSS 源。把编程语言、库或常用工具的最新版本汇总到一个源里。（前 3 个源免费）

56Remote Desktop Tools远程桌面工具5▾

Parsec↗

Free for installation on unlimited number of devices(for personal use) and allows up to 20 connections to a single device at once. (great for gaming/low latency work)个人使用可不限设备安装，并允许最多 20 个连接同时连到单台设备。（非常适合游戏与低延迟工作）

AnyDesk↗

Free for 3 devices, no limits on the number and duration of sessions3 台设备免费，会话数量与时长不限

Getscreen.me↗

Free for 2 devices, no limits on the number and duration of sessions2 台设备免费，会话数量与时长不限

RemSupp↗

On-demand support and permanent access to devices (2 sessions/day for free)按需支持与设备永久访问（免费每天 2 次会话）

RustDesk↗

Open source virtual/remote desktop infrastructure for everyone!面向所有人的开源虚拟与远程桌面基础设施！

57Other Free Resources其他免费资源11▾

get.localhost.direct↗

A better *.localhost.direct Wildcard public CA signed SSL cert for localhost development with sub-domain support更适合本地开发的 *.localhost.direct 通配公有 CA 签名 SSL 证书，支持子域名

GitHub Education↗

Collection of free services for students. Registration required.面向学生的免费服务合集。需注册。

Glob tester↗

A website that allows you to design and test glob patterns. It also provides resources to learn glob patterns.可设计并测试 glob 模式的网站，同时提供学习 glob 模式的资料。

Killer Coda↗

Interactive playground in your browser to study Linux, Kubernetes, Containers, Programming, DevOps, Networking浏览器中的交互式演练场，可学习 Linux、Kubernetes、容器、编程、DevOps 与网络

Microsoft 365 Developer Program↗

Get a free sandbox, tools, and other resources you need to build solutions for the Microsoft 365 platform. The subscription is a 90-day Microsoft 365 E5 Subscription (Windows excluded) which is renewable. It is renewed if you’re active in development(measured using telemetry data & algorithms).获取构建 Microsoft 365 平台解决方案所需的免费沙箱、工具与其他资源。该订阅是 90 天的 Microsoft 365 E5 订阅（不含 Windows），可续期。若你在开发上保持活跃（依据遥测数据与算法衡量）即可续期。

MySQL Visual Explain↗

Easy-to-understand and free MySQL EXPLAIN output visualizer to optimize slow queries.易懂且免费的 MySQL EXPLAIN 输出可视化工具，用于优化慢查询。

RedHat for Developers↗

Free access to Red Hat products including RHEL, OpenShift, CodeReady, etc. exclusively for developers. Individual plan only. Free e-books are also offered for reference.免费使用 Red Hat 产品，含 RHEL、OpenShift、CodeReady 等，仅限开发者，且仅限个人计划。另提供免费电子书供参考。

sandbox.httpsms.com↗

Send and receive test SMS messages for free.免费收发测试短信。

SimpleBackups.com↗

Backup automation service for servers and databases (MySQL, PostgreSQL, MongoDB) stored directly into cloud storage providers (AWS, DigitalOcean, and Backblaze). Provides a free plan for 1 backup.面向服务器与数据库（MySQL、PostgreSQL、MongoDB）的备份自动化服务，直接存入云存储供应商（AWS、DigitalOcean、Backblaze）。提供含 1 个备份的免费计划。

SimpleRestore↗

Hassle-free MySQL backup restoration. Restore MySQL backups to any remote database without code or a server.无痛的 MySQL 备份恢复。无需代码或服务器即可把 MySQL 备份恢复到任意远程数据库。

SnapShooter↗

Backup solution for DigitalOcean, AWS, LightSail, Hetzner, and Exoscale, with support for direct database, file system and application backups to s3 based storage. Provides a free plan with daily backups for one resource.面向 DigitalOcean、AWS、LightSail、Hetzner 与 Exoscale 的备份方案，支持把数据库、文件系统与应用直接备份到基于 S3 的存储。提供含 1 个资源每日备份的免费计划。