The PHP:IRC suite allows you to run an IRC applet on your site, an IRC "bot" similar to eggdrop, and to administer them as well as CGI:IRC. PHP:IRC is compatible with CGI:IRC, phpBB, YaBB, and other communities.
A project to make a clean, efficient IRC client for Mac OS X in Cocoa.
A fully functional Service-Set for IRCds such InspIRCd
ConnectServ for network connections
ConnectServ will actively monitor IRC network connections