Peter Dunkley, developer of Kamailio, author of websockets support, has announced that Crocodile-RCS has just open-sourced their MSRP over WebSocket Javascript stack.The project is hosted on Google Code:

The stack is distributed using the MIT License and was developed and tested along side the Kamailio MSRP over WebSocket implementation.

For more about MSRP via websocket, see:

Crocodile-RCS did recently a successful demo of this implementation at WebRTC Expo in San Francisco, video is available at: