Gobby 0.4.2

Gobby is a free collaborative editor supporting multiple documents in one session and a multi-user chat. Gobby runs on Mac OS X, Microsoft Windows, Linux and other Unix-like platforms.
It uses GTK+ 2.6 as its windowing toolkit and thus integrates nicely into the GNOME desktop environment.
Main features:
- Realtime Collaboration through encrypted channels (version 0.4.0 and up)
- Each user has its own changeable colour to be identified by others
- IRC-like chat for communicating with your partners while coding
- Syntax highlighting for most programming languages
- Session password protection
- Multiple documents in one session
- Dragndrop of documents into Gobby
- Document synchronisation on request
- Zeroconf support
- Unicode support
- Cross-platform: runs on Microsoft Windows, Linux, Mac OS X (albeit not natively) and other flavours of UN*X
NOTE: If you want to avoid building Gobby from source you can easily install it with the help of MacPorts by syncing your tree with "sudo port selfupdate", and then running "sudo port install gobby".