GTK LP for CUPS is a frontend for the lpr that comes with CUPS. It is written to make it easy to use nearly all the options from CUPS without knowing them by name. For print-admins, there is also an pretty simple queue tool implemented.
SirTobis ButtonBar is a simple GTK button bar. It has few dependencies, is highly configurable, and is intended to be used for administrating remote servers.
w3Chess is a Web- and email-based chess system. You make your move in
your Web browser, and get the latest move of your opponent via email.
w3Chess has only a few dependencies, and doesn't require Java,
Javascript, or even graphics support.