Arcangel is a jack effect for arctan distortion. Sounds nice and grungy without clipping at high levels, and sounds nice at lower levels.
Cheesetracker patch for adding info about realtime capabilities of LADSPA effects.
sauditor is a simple, text interface sample auditor with jack output and a spectrum analyser.
todo2html takes standard todo files and generates HTML output with plenty of options for formatting, hiding complete items, etc.
slat lets you play spooky theremin-like tunes with your mouse
powernap gives you accurate sleeping in Python
Perspective demo - the flatland renderer