Synthesia - A fun way to learn how to play the piano.
VirtualPiano.eu - VirtualPiano.eu is a web-based tool that provides you the virtual Piano to play songs, learn the piano tunes, and create soothing song compositions.
Playground Sessions - Online piano learning game.
PianoPlays - PianoPlays is the virtual piano tool that allows you to play and practice the tunes of your favorite songs.
Piano From Above - Piano From Above is a program that turns learning the piano into a videogame.
Recursive Arts Virtual Piano - A realistic 3D piano keyboard with flexible and automated song accompaniment of popular songs