It's an app that matches a number of pentatonic scales to chords. More importantly, I learned that prototyping everything in Python first cut development time in half!
Link: http://itunes.apple.com/us/app/pentatonica/id522252296?ls=1&mt=8
Link: http://itunes.apple.com/us/app/pentatonica/id522252296?ls=1&mt=8