Pocket piano basically is a virtual piano.
It come with excellent sound and large number of functions, such as multitouch, two full octave of notes and records.

(This image is not real screenshot from the application, it just for display purpose)

Try it here for free
Pocket Piano

Heard of Air Hockey? The one that we used to play in arcade centre.

It’s now available for your nokia phone. And surprisingly it is very interactive and no lagging at all.

I personally rate as 8/10.

Download it here for free. AIR HOCKEY