Description:

Tkabber is a Free and Open Source client for the Jabber
instant messaging system. It's written in Tcl/Tk, and
works on many platforms. The choice of Tcl/Tk for a Jabber
client is three-fold:
* it is portable: once you install a Tcl/Tk interpreter on
your system, the Tkabber script "just runs" — without having
to compile anything;
* it is customizable: Tkabber reads a configuration file when
it starts that tells it the settings of various parameters; and,
* it is extensible: the configuration file is actually a Tcl
script, so you can replace or augment entire portions of Tkabber
(if you're so inclined).