Maintainer: ircII project
IRC Channel: #ircII (official channel ?) on EFNet http://www.efnet.org/?module=servers
Originally written by Michael Sandrof, ircII comes with most Linux distributions. It uses termcap and shouldn't be a choice for most users, but is a standard. Mathusalem and other gurus will use it. Less ventured will regret to have it installed.
Maintainer: EPIC Software Labs
IRC Channel: #EPIC on EFNet
Based on ircII, EPIC (Enhanced Programmable ircII Client) is meant for real scripters and users searching freedom. When you start it for the first time you'll notice that you should really learn the basics of scripting.
Maintainer: Colten Edwards
IRC Channel: #BitchX on EFNet
Originally a script for ircII, BitchX is a popular client intended to reduce the need for scripting by including a huge array of features in the client itself (too many features for even experienced users to remember). Many consider BitchX bloatware (not necessarily a bad thing), but it is very popular amongst users and opers alike.
Maintainer: Timo Sirainen
Timo released yagIRC in 1997. It was a GUI client using the GTK+ toolkit. The army called on him a year later, and the new maintainers wouldn't do the job. yagIRC passed away and he started irssi as a replacement. It used GTK+. GNOME and curses versions would appear later. As of 0.7.90 it's only a modular text mode client. Supports Perl scripting.