Piano Visualizer - Bring your piano music to life with this application.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
MIDITrail - "MIDITrail" is a MIDI player which provides 3D visualization of MIDI datasets.
Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
Piano Connect - Piano Connect is one of the most popular piano learning apps that helps you play piano on your smartphone anywhere at any time.
Kauna - Kauna is a music visualizer. Kauna renders any sound reproduction in system.