Command-line client for WebSockets, like netcat (or curl)
Realtime application framework (Node.JS server)
HTTP proxy server,support HTTPS & websocket
Compliant web server for the most demanding of applications
websocket and http client and server library, with TLS support
An embedded web server
Fast and low latency asynchronous socket server & client C++ library
HTTP/WebSocket server C++14 library
Just another simple, fast, and resilient open-source WebSockets server
Bringing Http/Https and WebSockets High Performance servers for PyPy3
arduinoWebSockets
A simple WebSocket server
WebSocket client library built on SwiftNIO
Websockets for Laravel
High performance Node.js webserver with a simple-to-use API
LaravelS is an out-of-the-box adapter between Laravel/Lumen and Swoole
Ultra fast and low latency asynchronous socket server & client C#
Network library for developing TCP/UDP/SSL/HTTP/WebSocket/MQTT client
Socket.IO server implemented on Java
Universal Ruby library to handle WebSocket protocol
μWebSockets for Node.js back-ends
Realtime web comms for Clojure/Script
socket.io library for golang, a realtime application framework
Gev is a lightweight, fast non-blocking TCP network library
deepstream.io server