MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
Rentman - Cloud rental management software for the AV & Event industry
Plane9 - Plane9 is a revolutionary 3d visualizer where you never have to settle for just one view ever again.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
Current RMS - RMS for AV, production, broadcast & event rental companies