The GNU Privacy Assistant (GPA) is a graphical user interface for the GNU Privacy Guard (GnuPG). It can be used to encrypt, decrypt, and sign files, to verify signatures and to manage the private and public keys.

BackupPC is disk based and not tape based. This particularity allows features not found in any other backup solution:

this application contains every tool you would like to find when preparing math courses, exercises or their keys. Features: - symbolic calculus - tables of variations, LaTeX syntax - dynamic geometry - probability trees - graphs - function plotting - histograms, etc.

Golly simulates Conway's Game of Life with an arbitrarily large grid of cells. It can optionally use a hashlife algorithm, which allows it to rapidly compute generations for huge patterns, and to compute many generations into the future at a time.

KNetwalk is a puzzle game where the player arranges sections of wire to connect all the computers on the board.