free, distributed and user-friendly IRC / Twitter / XMPP / Campfire / JabbR client for Linux, Windows and Mac OS X based on GNOME / GTK+

Smuxi is in the official FreeBSD ports tree, so just run the following comand to install it from ports:

make -C /usr/ports/irc/smuxi/ install clean

Use this alternative to install it quickly using binary packages

pkg install smuxi

Now you can start Smuxi from the GNOME or KDE menu.