MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
Apophysis - Apophysis is a fractal flame editor and renderer for Microsoft Windows.
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.
Xaos - XaoS is an interactive fractal zoomer.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
Ultra Fractal - Ultra Fractal is a fractal generation and rendering software application.