Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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ws
A simple, blazing-fast, thoroughly tested WebSocket client and server library for Node.js.
Socket.IO
Bidirectional, low-latency, event-based realtime communication for Node.js and the browser.
websocket
A fast, RFC 6455-compliant WebSocket implementation for Go with full control over framing, compression, and concurrency.
@slack/web-api
Slack's official Node.js HTTP client for calling any of the 270+ Web API methods, with built-in queuing, retries, pagination, and rate-limit handling.
websockets
Build correct, fast WebSocket servers and clients in Python with asyncio, threading, or Sans-I/O APIs.
tokio-tungstenite
Asynchronous, Tokio-native WebSocket streams built on tungstenite
http-proxy-middleware
The one-liner Node.js proxy middleware for connect, express, next.js, hono, and more.
Echo
A minimalist, high-performance Go web framework with a radix-tree router, built-in middleware chain, and first-class HTTP/2 support.
Slack SDK for Python
The official Python SDK for building apps, bots, and integrations on the Slack Platform.
Socket.IO Redis Adapter
Scale Socket.IO across multiple server instances by broadcasting events through Redis
partysocket
A drop-in, auto-reconnecting WebSocket client with message buffering and React hooks
websocket-client
A low-level, dependency-free WebSocket client for Python supporting both synchronous and event-driven connections.
python-socketio
Python implementation of the Socket.IO realtime protocol for both servers and clients.
@fastify/websocket
Adds first-class WebSocket route support to Fastify, dispatching every upgrade through Fastify's own hooks and router instead of bolting ws on beside it.
bufferutil
Native buffer masking and unmasking utilities that make the ws WebSocket library fast.
websocket
Minimal, idiomatic Go WebSocket library with full context.Context support, zero dependencies, and Wasm compatibility.
tungstenite
A lightweight, stream-based WebSocket protocol implementation for Rust, runtime-agnostic by design
ws
A zero-allocation Go library for building fast, low-level RFC 6455 WebSocket servers and clients.
sockjs-client
Browser WebSocket emulation library that automatically falls back across streaming and polling transports for reliable realtime connections.
stompjs
A JavaScript and TypeScript STOMP client for connecting browsers and Node.js apps to WebSocket message brokers.
python-engineio
Python implementation of the Engine.IO realtime transport protocol powering Socket.IO servers and clients.
Flask-SocketIO
Socket.IO integration that brings real-time WebSocket communication to Flask applications
httpexpect
A chainable Go library for declarative, end-to-end HTTP and REST API testing.
Autobahn|Python
WebSocket and WAMP protocol implementation for Python, running natively on both Twisted and asyncio.
