An embedded web server
arduinoWebSockets
Just another simple, fast, and resilient open-source WebSockets server
Whakerpy - A light web application framework
Lua Application Server for micro-services with default communication
Distributed WebSocket Application Server ISO 20922
Python binding to the libindi library
REST and websockets C++ library
a single patch for direct communications between Pd and web browsers
JAVA websocket implementation for a bomberman-like game
WebSocket Library for .NET4.5