Command-line client for WebSockets, like netcat (or curl)
A barebones WebSocket client and server implementation
Realtime application framework (Node.JS server)
Eclipse Tyrus is the open source JSR 356 - Java API for WebSocket
An embedded web server
LaravelS is an out-of-the-box adapter between Laravel/Lumen and Swoole
arduinoWebSockets
Bringing Http/Https and WebSockets High Performance servers for PyPy3
websocket and http client and server library, with TLS support
High performance Node.js webserver with a simple-to-use API
Websockets in swift for iOS and OSX
Socket.IO server implemented on Java
Universal Ruby library to handle WebSocket protocol
Network library for developing TCP/UDP/SSL/HTTP/WebSocket/MQTT client
Just another simple, fast, and resilient open-source WebSockets server
A server side alternative implementation of socket.io
μWebSockets for Node.js back-ends
Compliant web server for the most demanding of applications
JSON-RPC 2.0 implementation over WebSockets for Node.js
A simple server for sending and receiving messages in real-time
deepstream.io server
WebSocket client library built on SwiftNIO
Socket.IO-client for iOS/OS X
HTTP proxy server,support HTTPS & websocket
Minimal and idiomatic WebSocket library for Go