IK Multimedia iRig PADS USB-MIDI Pad Controller for iOS, Android, Mac, – Audio MIDI Plus
Korg plugKEY Mobile MIDI/Audio Interface for iOS PLUGKEYBK B&H
iRig Midi Interface For iOS Devices | iPad Music Apps Blog - Music app reviews, news and tutorials
MIDI Router and Processor for iOS
USB Type B to Midi Cable, USB OTG Cable 2.0 iOS Devices Compatible with Select iPhone,Midi Controller, Electronic Music Instrument, Midi Keyboard, Recording Audio Interface, USB Microphone - Walmart.com
Vestax VMIDI - MIDI for all iOS devices • DJWORX
Seven iOS MIDI Sequencers Worth Considering
How to use external MIDI hardware as input to iPad for controlling Gestrument PRO