X-Chat Aqua is X-Chat with an Aqua interface for MacOS X. X-Chat Aqua uses the irc engine from X-Chat, and is designed to look and feel like the GTK+ front end.
A project to make a clean, efficient IRC client for Mac OS X in Cocoa.
The Open Descent Foundation (ODF) is a community for developers, who want to help to create open source programs, tools, etc. for the famous games Descent1, -2 or -3. Everyone can join the ODF if he accepts the idea of writing open source programs.
iTonamaton is an open source objective c IRC information bot, targeted for use on machines running Mac OS X and Gnustep. If you wish to talk directly to the developers, we can be found in #itonamaton on irc.freenode.net