GtkPerf is an application designed to test GTK+ performance. The point is to create common testing platform to run predefined GTK+ widgets (opening comboboxes, toggling buttons, scrolling text) and this way define the speed of device/platform.

The Emilia Pinball Project is a pinball simulator for GNU/Linux and other Unix systems. There are only two levels to play with, but they are very addictive.

JuK is a powerful music player capable of managing a large music collection.

TLP is a feature-rich command-line utility, saving laptop battery power without the need to delve deeper into technical details.

Exult is an open source engine for playing Ultima VII on a variety of modern operating systems and environments. The Black Gate (including Forge of Virtue) and Serpent Isle (plus Silver Seed) are both playable to the end. Some differences to the original games exist; see sections 5.3/5.4 of the FAQ.

GtkHash is a small GTK+ utility which allows users to compute message digests or checksums using the mhash library. Currently supported hash functions include MD5, MD6, SHA1, SHA256, SHA512, RIPEMD, TIGER and WHIRLPOOL.