This is the chess game from the GNOME desktop. It allows one to play with most existing chess engines, or against a human opponent.

Zenmap is an Nmap frontend. It is meant to be useful for advanced users and to make Nmap easy to use by beginners. It was originally derived from Umit, an Nmap GUI created as part of the Google Summer of Code.

Meld is a graphical diff viewer and merge application for the GNOME desktop. It supports 2 and 3-file diffs, recursive directory diffs, diffing of directories under version control (Bazaar, Codeville, CVS, Darcs, Fossil SCM, Git, Mercurial, Monotone, Subversion), as well as the ability to manually and automatically merge file differences.

FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. It supports the most obscure ancient formats up to the cutting edge.

MyPaint is a pressure- and tilt-sensitive painting program which works well with Wacom graphics tablets and other similar devices. It comes with a large brush collection including charcoal and ink to emulate real media, but the highly configurable brush engine allows you to experiment with your own brushes and with not-quite-natural painting.