node-ws 7.2.1-3 (amd64 binary) in ubuntu groovy

 ws is a simple to use websocket implementation, up-to-date against RFC-6455,
 and probably the fastest WebSocket library for Node.js.
 .
 Passes the quite extensive Autobahn test suite. See
 http://einaros.github.com/ws for the full reports.
 .
 It also provides wscat, a command-line tool which can either act
 as a server or a client, and is useful for debugging websocket services.
 .
 Node.js is an event-based server-side javascript engine.