Command-line client for WebSockets, like netcat (or curl)
Realtime application framework (Node.JS server)
An embedded web server
Network library for developing TCP/UDP/SSL/HTTP/WebSocket/MQTT client
deepstream.io server
Polyglot replacement for Ruby WebSocket servers with Action Cable
HTTP proxy server,support HTTPS & websocket
μWebSockets for Node.js back-ends
A Socket.IO client library for Java
Compliant web server for the most demanding of applications
arduinoWebSockets
Just another simple, fast, and resilient open-source WebSockets server
Websockets for Laravel
websocket and http client and server library, with TLS support
high performance dotnet core socket tcp communication components
A simple WebSocket server
Bringing Http/Https and WebSockets High Performance servers for PyPy3
Fast and low latency asynchronous socket server & client C++ library
Ultra fast and low latency asynchronous socket server & client C#
Eclipse Tyrus is the open source JSR 356 - Java API for WebSocket
JSON-RPC 2.0 implementation over WebSockets for Node.js
Universal Ruby library to handle WebSocket protocol
WebSocket client library built on SwiftNIO
High performance Node.js webserver with a simple-to-use API
HTTP/WebSocket server C++14 library