Juggernaut

This is a really interesting plugin for your Ruby On Rails apps, like they said:

“aims to revolutionize your Rails app by letting the server initiate a connection and push data to the client. In other words your app can have a real time connection to the server with the advantage of instant updates.”

The plugin Juggernaut initiates a flash xmlsocket between server and browser allowing real time communication between the two. The open socket connection allows the server to ‘push’ base64 encoded javascript to the browser which is subsequently decoded and evaluated.

So generally something like Comet for Rails