GuitarDroid Pro 1.0
the author of this app says:
GuitarDroid is a tactile guitar. Just touch the screen and listen to your guitar.
You can also see and listen to a big variety of chords ans scales, select 4, 5, 7 or 9 frets and switch the notes information 0n/0ff.
This full version contains 6 differents guitars, 24 types of scales and 18 types of chords.