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Socket.io - Realtime application framework (Node.JS server)
WebSocket-Node - A WebSocket Implementation for Node.JS ( Draft -08 through the final RFC 6455 )
Pusher - Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.
Lightstreamer - Lightstreamer is a server for delivering real-time messages to browser-based and mobile...
Hydra by DataSecs - Hydra is built upon Netty. It is supposed to simplify the process of socket setup in Java.
gevent - gevent is a coroutine -based Python networking library that uses greenlet to provide a high-level...