Ukulele San is a virtual instrument that has the the features of a real ukelele combined with abilities that would be otherwise impossible to recreate.

Changes:

Chord Shift function is added!!!
It will let you change the key& types of chords very easily.
Left, right, up and down arrows will appear on the screen. The left and right arrows let you change the types of the chords.
The up and down arrows let you change he keys of the chords.

http://appshopper.com/music/ukulele-san