These apps are optimized for the larger screens of tablets and have either just hit the Android Market, or will be released this summer
Though designed primarily to help find guitar-chord apps, Chord! works with any number of frets. The app's developer uses an algorithm that finds all voicings for a given chord. It can also do reverse searches for chords, and it gives you scales, too. The app is optimized to detect whether you are using a phone or a tablet. While the paid version has been around for a while, the free version, which removes some features, just launched.