MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
Electric Sheep - Electric Sheep is a collaborative abstract artwork founded by Scott Draves.
Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
ChaosPro - Windows 95/98/NT fractal generation and exploration program with 3D, network, animation, 24 bit support, compatible to FractInt, compatible to UltraFractal.
Plane9 - Plane9 is a revolutionary 3d visualizer where you never have to settle for just one view ever again.
Apophysis - Apophysis is a fractal flame editor and renderer for Microsoft Windows.