OpenHomer is an open source IRC client for the Macintosh. Based on the recently released Homer 2000 client, which in turn was a retrospective on the original Homer client, OpenHomer is open IRC software for the Mac.
An IRC client that uses Tcl for not only the scripting, but also the "glue" at the C level for how all the parts of the application fit together.
This is a simple RFC 1459 compatible IRC library that uses the socket classes of wxWidgets.
EggControl is a tcl tk application that can be used for: Eggdrop config file generating, channel maitnence, and user maitnence. as well as in the near future advanced botnet setup and hopefully an easy to use scripting interface
A core framework for Intricate Software's XChatter software. Supports IRC protocol and is written in Objective-C.
Sexy - the multiplatform and user friendly instant communicator project that uses plugins to provide access to the different networks (e.g. IRC, ICQ, Gadu-Gadu, XMPP are planned).