Synthesia - A fun way to learn how to play the piano.
SeeMusic - Official Download for the SeeMusic App
Piano From Above - Piano From Above is a program that turns learning the piano into a videogame.
Playground Sessions - Online piano learning game.
Linthesia - Linthesia is a game. A game of playing music! You only need a MIDI file
Keysight - Keysight is a real-time MIDI visualization platform powered by Unreal Engine, built for piano-focused streamers and content creators, and featuring unmatched customization!