Audulus - A universe of sound at your fingertips - Audulus is a modular music processing app
keezy - A colorful soundboard. Play with music.
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Blocs Wave - A free audio app for creating music loops.
GarageBand - GarageBand is a fully equipped music creation studio for Mac