SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
n-Track 8 - Audio and music recording, editing and mixing software for Windows, Mac, iOS and Android. Record your music easily from your computer or smartphone.
keezy - A colorful soundboard. Play with music.
PocketBand Lite - PocketBand Lite is a full-featured music composition environment for Android devices.
Splice - Music creation, collaboration, and sharing made simple.
Auria - Multitrack Digital Audio Workstation for iPad.