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
deepstream.io server
Polyglot replacement for Ruby WebSocket servers with Action Cable
arduinoWebSockets
websocket and http client and server library, with TLS support
Fast and low latency asynchronous socket server & client C++ library
Universal Ruby library to handle WebSocket protocol
Eclipse Tyrus is the open source JSR 356 - Java API for WebSocket
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
Network library for developing TCP/UDP/SSL/HTTP/WebSocket/MQTT client
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
LaravelS is an out-of-the-box adapter between Laravel/Lumen and Swoole
Socket.IO-client for iOS/OS X