A simple, small and lightweight guitar/bass tuner for jack. Gxtuner comes with a analogue like interface (scale), show the tune (char) and the accumulated frequency (Hz).

Veusz is a 2D and 3D scientific plotting and graphing package, designed to produce publication-ready PDF, SVG, Postscript and bitmap output. Veusz provides a GUI, command line and scripting interface (based on Python) to its plotting facilities. The plots are built using an object-based system to provide a consistent interface.

PHASEX is an experimental JACK audio / ALSA MIDI softsynth for Linux with a synth engine built around flexible phase modulation and flexible oscillator/LFO sourcing.

Kigo is an open-source implementation of the popular Go game. Go is a strategic board game for two players. It is also known as igo (Japanese), weiqi or wei ch'i (Chinese) or baduk (Korean). Go is noted for being rich in strategic complexity despite its simple rules. The game is played by two players who alternately place black and white stones (playing pieces, now usually made of glass or plastic) on the vacant intersections of a grid of 19x19 lines (9x9 or 13x13 for easier games).