Audulus - A universe of sound at your fingertips - Audulus is a modular music processing app
BeatStyle - A mobile recording studio!
Blocs Wave - A free audio app for creating music loops.
Groovebox: Beat & Synth Studio - Make Music & Play Instruments
FL Studio Mobile - Create & save multi-track music projects on a smartphone
VOXISO - Online AI-powered vocal and music remover