I'm building midimech. It's an isomorphic musical layout system for midi controllers with a grid layout. It lays out the notes in a way that makes most scales and chords easier to play than other instruments. For example, if you can play the shape of a triangle, you know how to play every major chord. An upside-down triangle is a minor chord. Most scales fit nicely along the fingers since you're running rows of 3 or 4 notes and going to the next one. The layout is closely related to the circle of 5ths, making chord progressions easier too. It's got a lot of features too, including a MIDI visualizer for learning songs, and a scale/mode database. We're just starting out and more controller support is coming soon.