The Ocarina 2
The sound is poorly settable, very "soft minded" and the playing is very slow.
You can have an idea of the possibilities with those 2 videos :
- here : normally played
- there : played as a nose flute
Ocarina 2 is Free.
Link to the Ocarina 2 page
What's funny in this app, is that it is design from scratch to be played with the nose. It also shows great graphics. Unfortunately, you do not need to blow to play the Nosemonica, but just to slide your nose on the touch sensitive screen.
The sound is not settable at all, but is like an correct harmonica. No choice of a scale neither (you cannot play the Blues!:/).
Here is the sound you get :