Company Confusion Studios LLC created these great apps:
MIDI Designer Pro X, MIDI Designer Lite 2, MIDI Designer Limited 2, MIDI Designer XW, Earplug, Read My Watch, MDClav: Clavinova Controller, MDXG: XG Sound Set Controller, MD77: Yamaha SY77/TG77 Editor, MDDX1 for the Yamaha reface DX, MDDX2: Performance Tool, and others..