Audulus - A universe of sound at your fingertips - Audulus is a modular music processing app
Keezy Drummer - Make a beat in seconds
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
Zenbeats - A cross platform music making app
Blocs Wave - A free audio app for creating music loops.
FL Studio Mobile - Create & save multi-track music projects on a smartphone