MIDI Visualizer - Small cross-platform MIDI visualizer written in C++/OpenGL
Lifeblood Live Wallpaper - Float along in a stylized real-time 3D vein full of red blood cells!
MIDITrail - "MIDITrail" is a MIDI player which provides 3D visualization of MIDI datasets.
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.
Piano VFX - Free piano visualizer with advanced particle effects.
My Piano - My piano is an app that allows you to learn piano with a virtual on-screen keyboard.