Oscon-chat is a project mainly written in JavaScript, it's free.
My oscon presentation chat app
This is the chat example for my OSCon talk on 26/07/11 titled "Writing a Chat Server with Socket.IO".
Unlike other chat examples, each browser client gets 1 chat screen, and they talk 1-on-1 with an "admin".
npm install .
.node app.js
.http://localhost:3000
and
http://localhost:3000/admin
for the admin interface.