irssix

Irssix is a Free (GPL) irc client for Mac OS X. It is based on the fabulous unix irc client Irssi.
Features:
- Speed!

Is this the snappiest gui irc client for mac os x?
- clickable links
- regular expression line limiting
- connect dialog box
- accent support
- color
- perl scripting support
- and most features from Irssi.