Miranda NG: Next Generation of Miranda IM
The extensible chat client
Anope hybrid services for use on the Karma-Irc network.
A universal instant messaging (IM) program
A lightweight, high-performance Internet Relay Chat server
ultimate channel management tcl script for eggdrop
A SSH based chatroom.
Free, portable and lightweight Internet Relay Chat server
BOT IRC in Perl
Full mIRC MSL Script
Some old IRC clients patched up for 'modern' Linux