Sometime ago when I started playing with WebSockets I created a tiny server in nodejs that would bounce back all the packets received to all the connected users. I kept improving it and today I decided it would be nice to refactor,document and share it. I have upload it to github.
It comes with some handy functionalities like rooms, data storage, REST API to retrieve info about rooms, and with its own client library so you don’t need to memorize the API. I wouldnt recommend to use it on production, mostly because it is easy to hack, but it is handy to connect users in a website between them.
It is the one I use in my sharedcanvas web application.