Audulus - A universe of sound at your fingertips - Audulus is a modular music processing app
Clone Hero - Clone Hero is a free rhythm game, which can be played with any 5 or 6 button guitar controller...
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.
Blocs Wave - A free audio app for creating music loops.
Frets on Fire - Bonus content.