I've done some experiments in showing interval classes (to highlight differences between consonance and dissonance), but the techniques don't work well for most pieces, and this is the only sample I've published: https://www.youtube.com/watch?v=7Xu2cSEko6M
When I learned more about auditory neurology, I did some experiments with that (see this page in my project timeline http://www.musanim.com/mam/hist33.html ).
But mostly, I don't think any of these approaches (or anybody else's, for that matter), really do the job.
Touch Pianist is one of the latest implementations of an idea that's been around for a long time: technologically-assisted musical performance; here's an historical overview on the subject: The Conductor Program — computer-mediated musical performance (http://www.musanim.com/tapper/). Aaron Andrew Hunt is about to release a professional-grade version of this which will let you use your own MIDI files.
A fun, easy-to-use implementation of the conductor program (see http://www.musanim.com/tapper/ for an historical overview of this idea). Not a professional-grade tool, but a good introduction. I played through all the fugues in the first book of Bach's Well-Tempered Clavier --- I ALMOST know them well enough to do this perfectly (except, of course, for the ornaments; I almost never guessed those right). The one thing that surprised me: after playing for a while, my fingertips felt really bruised (this is on an iPad); I've played the piano for 54 years, and I've never had this sensation playing a real keyboard instrument.