Free Android MIDI Music Making Apps — iConnectivity
Android Phone Midi Controller - YouTube
External USB MIDI Controller Keyboard on Android ICS (Galaxy Note) - YouTube
Android MIDI Ribbon Controller
Amazon.com: IK Multimedia iRig Keys I/O 25-Keys Midi Controller with 24-bit up to 96kHz Audio Interface for iPhone/iPad, Android and Mac/PC : Everything Else
TouchDAW Ableton Live 9 setup tutorial - Invisible Agent Records