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