Command-line client for WebSockets, like netcat (or curl)
Realtime application framework (Node.JS server)
μWebSockets for Node.js back-ends
arduinoWebSockets
Compliant web server for the most demanding of applications
An embedded web server
Fast and low latency asynchronous socket server & client C++ library
deepstream.io server
Network library for developing TCP/UDP/SSL/HTTP/WebSocket/MQTT client
Polyglot replacement for Ruby WebSocket servers with Action Cable
websocket and http client and server library, with TLS support
Future-based Tungstenite for Tokio
Minimal and idiomatic WebSocket library for Go
Eclipse Tyrus is the open source JSR 356 - Java API for WebSocket
Extensible socket server application framework for .NET
A Socket.IO client library for Java
Fast, well-tested and widely used WebSocket implementation for Go
Socket.IO server implemented on Java
HTTP/WebSocket server C++14 library
Universal Ruby library to handle WebSocket protocol
Bringing Http/Https and WebSockets High Performance servers for PyPy3
A server side alternative implementation of socket.io
JSON-RPC 2.0 implementation over WebSockets for Node.js
WebSocket client library built on SwiftNIO
High performance Node.js webserver with a simple-to-use API