X-Chat on Redhat 9 Linux and Chatzilla on Win98.
P.S. The person who stated "Never leave Emacs" needs serious, professiona help IMMEDIATELY
I'm afraid I've been forced to chop out my web-based java irc client for a few reasons;
Sorry folks, I can heaertily recommend using a REAL irc client such as mIRC, gaim or even chatzilla.
Java chat client will be downed in nthe next 24 hours.