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 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)

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

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

WebSocket emulation - Python server

A fast, well-tested and widely used WebSocket implementation for Go.

Tiny WebSocket library for Go.

Simple, secure & standards compliant web server 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++.

websocket and http client and server library, with TLS support and very few dependencies

WebSocket server demo implemented with C++ & libevent

Play Framework

Finagle Websocket clients and servers

An asynchronous event driven PHP socket framework. Supports HTTP, Websocket, SSL and other custom protocols.

Asynchronous WebSocket server

A Websockets server written in PHP.

WebSocket client and server in PHP

:part_alternation_mark: Websocket server for Symfony applications (powered by Ratchet), includes a Autobahn.JS based JavaScript client

Simple WebSocket server implemented in PHP.

The Hoa\Websocket library.

PHP Web Socket server

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

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

Event Driven WebSockets Framework with Cross-Browser Fallbacks

A Java event based WebSocket and HTTP server

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

Embedded Web Server

canonical libwebsockets.org networking 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.

WSServer is a fast, configurable, and extendable WebSocket Server for UNIX systems written in C (C11).

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

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

Distributed Pubsub Server for Realtime Apps

Simple, reliable, efficient streaming for Cowboy.

WebSocket emulation - Erlang server

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

Polyglot replacement for Ruby WebSocket servers with Action Cable protocol

Plug and play websocket support for ruby on rails.

Open Pusher implementation compatible with Pusher libraries

EventMachine based WebSocket server

Real-time Rails Partials

Standards-compliant WebSocket client and server

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

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

Universal Ruby library to handle WebSocket protocol

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

Simple WebSocket Client on Ruby

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