I don't use chat, but I use Fedora, so I entered this command in a bash shell:
yum search chat | grep client
I got 15 results: xchat, epic, coccinella, ekg2, ggz-gtk-client, gyachi, kmess, konversation, mcabber, naim, ninja, psi, sugar-chat, talk and weechat.
is part of the KDE project, so it's likely to be mature and complete (and it may be already installed on your system).
Any of them can be installed immediately with this command (as root), replacing PACKAGE with the package name:
yum install PACKAGE
Or, any user can get a little more information, including a web url with this command: