Quarry is a multi-purpose GUI for several board games, at present Go, Amazons and Reversi (a.k.a. Othello.) It allows users to play against computer players (third-party programs, e.g. GNU Go or GRhino) or other humans, view and edit game records.

H.323 and SIP compatible videoconferencing and VoIP/IP-Telephony application that allows you to make audio and video calls to remote users with H.323 hardware or software (such as Microsoft Netmeeting) as well as SIP endpoints.

Audio Tag Tool is a program to manage the information fields in MP3 and Ogg Vorbis files (commonly called tags). Tag Tool can be used to edit tags one by one, but the most useful features are mass tag and mass rename. These are designed to tag or rename hundreds of files at once, in any desired format.

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.