Eclipse Tyrus is the open source JSR 356 - Java API for WebSocket
Minimal and idiomatic WebSocket library for Go
Use your text editor to write in your browser
Socket.IO server implemented on Java
WebSocket emulation and Javascript client
WebSocket emulation - Node.js server
Turn any program that uses STDIN/STDOUT into a WebSocket server
A node.js module for websocket server and client
PHP WebSocket server
a single patch for direct communications between Pd and web browsers