MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
JWildfire - Modern ui, soft developed and ugraded by andreas maschke for design 2d and 3d fractal flames. Very nice app and powerful.
Amarok - The Amarok team is proud to announce the immediate availability of the result of 2 years of hard work, the beta release of Amarok 2. 9. This release is marked by improvements, corrections and polishing of nearly all Amarok features.
Apophysis - Apophysis is a fractal flame editor and renderer for Microsoft Windows.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
Electric Sheep - Electric Sheep is a collaborative abstract artwork founded by Scott Draves.