MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
Algorithmia - Algorithmia makes applications smarter, by building a community around algorithm development, where state of the art algorithms are always live and accessible to anyone.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
MCenter - Machine Learning Operationalization
Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
Numericcal - Machine Learning Operationalization