WebSocket and WAMP in Python for Twisted and asyncio
Compliant web server for the most demanding of applications
Bringing Http/Https and WebSockets High Performance servers for PyPy3
deepstream.io server
JSON-RPC 2.0 implementation over WebSockets for Node.js
golang supports million-connection distributed chat (IM) system
Turn any program that uses STDIN/STDOUT into a WebSocket server
REST and websockets C++ library
Karellen Gevent Websocket Library
A lightweight and scalable asynchronous WebSocket listener