Open source API development ecosystem - https://hoppscotch.io (open-source alternative to Postman, Insomnia)
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Updated
Jun 26, 2025 - TypeScript
WebSocket is a computer communications protocol, providing full-duplex communication channels for interaction between a web browser (or other client application) and a web server over a single TCP connection. The WebSocket protocol allows for sending messages to a server and receiving event-driven responses without having to poll the server for a reply, facilitating real-time data transfer from and to the server. This is made possible by providing a standardized way for the server to send content to the client without being first requested by the client, and allowing messages to be passed back and forth while keeping the connection open. In this way, a two-way ongoing conversation can take place between the client and the server.
Open source API development ecosystem - https://hoppscotch.io (open-source alternative to Postman, Insomnia)
Realtime application framework (Node.JS server)
A fancy, easy-to-use and reactive self-hosted docker compose.yaml stack-oriented manager
⚡ The one-liner node.js http-proxy middleware for connect, express, next.js and more
Deploy headless browsers in Docker. Run on our cloud or bring your own. Free for non-commercial uses.
deepstream.io server
The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬
Next-gen, Pusher-compatible, open-source WebSockets server. Simple, fast, and resilient. 📣
Slack Developer Kit for Node.js
A framework to build Slack apps using JavaScript
Watch streaming media with friends.
Actionhero is a realtime multi-transport nodejs API Server with integrated cluster capabilities and delayed tasks
Developer-first OpenSource API DevTool, Postman/Insomnia alternative.
Web client prototype for scrcpy.
Node.js library to receive live stream events (comments, gifts, etc.) in realtime from TikTok LIVE.
🔮 Secure direct video group chat
A lyric player component library aims to look similar to iPad version of Apple Music. Also with DOM, React and Vue bindings. 一个基于 Web 技术制作的类 Apple Music 歌词显示组件库,同时支持 DOM 原生、React 和 Vue 绑定。
Created by Michael Carter, Ian Hickson