Bringing Http/Https and WebSockets High Performance servers for PyPy3
High performance Node.js webserver with a simple-to-use API
Simple, fast, reliable websocket server & client
Network library for developing TCP/UDP/SSL/HTTP/WebSocket/MQTT client
Extensible socket server application framework for .NET
A server side alternative implementation of socket.io
deepstream.io server
Realtime web comms for Clojure/Script
Gev is a lightweight, fast non-blocking TCP network library
high performance dotnet core socket tcp communication components
Your high performance web application C framework
golang supports million-connection distributed chat (IM) system
Distributed WebSocket Application Server ISO 20922