(how-to can be found in the forums here: http://www.wcugaming.org/forums/index.php?…st&p=28102)
well, the actual official version of xchat is going to require money if used on windows, go with silverex.org or another build if you want to use it.
then there’s always the java client at http://www.wcugaming.org/irc.php.
and too, if you happen to use linux, just google linux irc clients, there’s a freakin million of them.
other than that i don’t know others by name…
i do know that some multifunction programs like trillian and gaim/pidgin will cover irc as well.
and you could always google it. particularly i would try “open source irc client” or “GPL irc client”, as those will be entirely free, or theoretically “free irc client” should turn up some good programs