In this App I use some sound effects. As I'm unable to use Garageband or anything that generates a sound, I've decided to download from FreeSound.org, the lovely community for sound effects enthusiats
http://www.freesound.org/samplesViewSingle.php?id=69190
http://www.freesound.org/samplesViewSingle.php?id=72558
http://www.freesound.org/samplesViewSingle.php?id=28114
http://www.freesound.org/samplesViewSingle.php?id=76405
To create the buttons, icons and other artwork in the App (if you can call that art) I've used ArtText 2.
By the way: all icons and artwork are included with the App. You can use them, modify, etc., according to the GPL 2 license.