Eclipse Tyrus is the open source JSR 356 - Java API for WebSocket
A barebones WebSocket client and server implementation
HTTP proxy server,support HTTPS & websocket
Socket.IO server implemented on Java
A Socket.IO client library for Java
Clojure HTTP server/client library with WebSocket support
Make writing Java http clients easier
Eclipse Jetty - Web Container & Clients - supports HTTP/2, HTTP
Nginx module for embedding Clojure or Java or Groovy programs
Java Single Page Web Application Framework
WebSocket & WAMP in Java for Android and Java 8
rxWebSocket is a simple reactive extension of OkHttp Websocket
JAVA websocket implementation for a bomberman-like game
AppServer Forge
C++ SIP stack based on Chrome source code