Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
Synfig Studio - Just another WordPress site
MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
Creature - Creature 2D Skeletal and Mesh Animation Tool
Kauna - Kauna is a music visualizer. Kauna renders any sound reproduction in system.
Live2D Cubism - Live2D is the world's first drawing technology to enable 3D rendering of 2D images.