Aftertouch - Aftertouch – 3D MIDI Controller created and published by Kevin Nelson.
ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
7Pad Scales and chords - Music instrument and assistant for playing scales and chords.
keezy - A colorful soundboard. Play with music.
Scale Heaven - Browse and play any scale/chord, chord progression.