Primus - Primus, the creator god of the transformers & an abstraction layer for real-time to prevent...
Socket.io - Realtime application framework (Node.JS server)
SocketCluster - An open, scalable realtime engine for Node.js
Faye - Simple pub/sub messaging for the web
Apprenda - Apprenda is a software layer that transforms any infrastructure into a policy-driven, hybrid cloud application platform.
SockJS - SockJS is a browser JavaScript library that provides a WebSocket-like object.