PyChess is a gnome-inspired chessclient written in python. Licensed under the free GPL license
The goal of PyChess, is to provide a fully featured, nice looking, easy to use chess client for the gnome-desktop.
The client should be usable both to those totally new to chess, those who want to take a game here and there, and those who wants to use the computer to further enhance their play.
More screenshots: http://pychess.googlepages.com/screenshots