WebSocket Libraries

Realtime application framework (Node.JS server)

Simple to use, blazing fast and thoroughly tested WebSocket client and server for Node.js

A WebSocket Implementation for Node.JS (Draft -08 through the final RFC 6455)

WebSocket emulation - Node.js server

A node.js module for websocket server and client

Standards-compliant WebSocket client and server

A Promise-based API for WebSockets

JavaScript client and server side transport API based on WebRTC & WebSocket

Lightweight WebSocket lib with socket.io-like event handling, requests, and channels

Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.

WebSocket implementation in Python 3

WebSocket and WAMP in Python for Twisted and asyncio

[Project on Hiatus] WebSocket client and server library for Python 2 and 3 as well as PyPy (ws4py 0.5.1)

WebSocket emulation - Python server

A python based websocket server that is simple and easy to use.

A simple fully working websocket-server in Python with no external dependencies

ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.

Incredibly simple real-time web for .NET

A C# implementation of the WebSocket protocol client and server

C# Websocket Implementation

A high performance websocket server library powering Stack Overflow.

Real-Time library for ASP .NET Core

An extremely efficient C# WebSocket server.

WebSocket RPC library for .NET with auto JavaScript client code generation, supporting ASP.NET Core

Play Framework

Finagle Websocket clients and servers

Simple, secure & standards compliant web I/O for the most demanding of applications

C++ websocket client/server library

HTTP and WebSocket built on Boost.Asio in C++11

A very simple, fast, multithreaded, platform independent WebSocket (WS) and WebSocket Secure (WSS) server and client library implemented using C++11, Boost.Asio and OpenSSL. Created to be an easy way to make WebSocket endpoints in C++.

unreal engine 4 websocket plugin for both c++ and blueprint developer

WebSocket server on C++ & libevent

A WebSocket implementation for Go.

Tiny WebSocket library for Go.

An asynchronous event driven PHP framework for easily building fast, scalable network applications. Supports HTTP, Websocket, SSL and other custom protocols. Supports libevent, HHVM, ReactPHP.

Asynchronous WebSocket server

A Websockets server written in PHP.

:part_alternation_mark: Symfony2 server side (Ratchet) & client websocket (Autobahn)

The Hoa\Websocket library.

WebSocket client and server in PHP

A simple WebSocket Server and Client implementation in PHP.

PHP Web Socket server

PHP microframework designed to build a RestApi working together with a websocket server. Build a real time RestApi!

Small, fast, modern HTTP server for Erlang/OTP.

Distributed Pubsub Server for Realtime Apps

Simple, reliable, efficient streaming for Cowboy.

WebSocket emulation - Erlang server

Mongoose Embedded Web Server Library - Mongoose is more than an embedded webserver. It is a multi-protocol embedded networking library with functions including TCP, HTTP client and server, WebSocket client and server, MQTT client and broker and much more.

canonical libwebsockets.org websocket library

Your high performance web application C framework

A Lightweight and fully asynchronous WebSocket client library based on libev

C library for easy WebSockets server.

A websocket server written in C.

A barebones WebSocket client and server implementation written in 100% Java.

Realtime Client Server Framework for the JVM, supporting WebSockets with Cross-Browser Fallbacks

A Java event based WebSocket and HTTP server

Tyrus - Reference implementation of Java API for WebSocket - JSR 356

Plug and play websocket support for ruby on rails.

EventMachine based WebSocket server

Open Pusher implementation compatible with Pusher libraries

Real-time Rails Partials

Polyglot replacement for Ruby WebSocket servers with Action Cable protocol

Standards-compliant WebSocket client and server

Build realtime Ruby web applications. Created by the fine folks at Poll Everywhere.

iodine - HTTP / WebSockets Server for Ruby with Pub/Sub support

Universal Ruby library to handle WebSocket protocol

Light-weight, DRY as a desert, web framework for Ruby.

Simple WebSocket Client on Ruby

A Retrofit inspired WebSocket client for Kotlin, Java, and Android

Realtime web comms for Clojure/Script

A library designed to bridge the gap between the triad of CLJ/CLJS, web-sockets and core.async.

Lightweight, event-driven WebSockets for Rust.

A WebSocket (RFC6455) library written in Rust

WebSocket support for the ngx_lua module (and OpenResty)

Websockets for Lua.

A Haskell library for creating WebSocket-capable servers

:lock: Secure WebSocket (WSS) clients in Haskell.

Websockets for Elm