Remember the music making apps that came out last year for the iPhone? You blow across the mic of the iPhone, press buttons on the screen and make music.

The folks at IDEO have a little twist on that, and just in time for the year ending parties! Their app, Party Whistle, makes your iPhone into an electronic whistle. Great for your next party, be it a work gathering or New Year event.

Party Whistle is currently free, to go with the whistle audio, there are also animations and a few surprises.