Here you go!
-Node.js
-socket.io
Install node and npm
Get a copy of this repo
Put it in a folder, go there
You might need to do npm install . ( maybe nmp install . -d)
node app.js to run.
Find it on http:/talk.jit.su/
-Opt-in audio notification of connect/disconnect
-Anti-cheat: try sending '/godmode'
-Twitter/Geekli.st linking: @username for Twitter, [username] for geekli.st
-No duplicate names: Adds a number to every duplicate name!
-Question answering bot! bot: question?
-Completely free to use for whatever purpose, as long as you keep the 'copyleft'-symbol