Amazon.com: Donner MIDI Keyboard Controller, DMK25 Portable MIDI with 25 Responsive Keys, 8 Great Tactile Backlit Drum Pads, 4 Assignable Knobs for Beginners & Music Composition Lover, Great Gift for Son, Black :
QS as a MIDI controller
Lekholm Instruments
Emonica – An Open Source Take On The Millioniser 2000 MIDI Harmonica – Synthtopia
Electronic harmonicas – Chromatic Harmonica History