Synthesia - A fun way to learn how to play the piano.
Giada - Giada is a free, minimal, hardcore audio tool for DJs, live performers and electronic musicians.
Playground Sessions - Online piano learning game.
Loopy Pro - Loopy, the sophisticated, tactile live looper app that reinvents iPhone and iPad music making.
Piano From Above - Piano From Above is a program that turns learning the piano into a videogame.
Repetito - Repetito: the multichannel looper software for live performance on the PC.