iTunes offers downloads of Pou for iPhone and iPad for free. (Google Play and Amazon charge the same for Android.) That's $2 off and the lowest price we could find. This game allows you to feed and take care your very own alien pet.
iTunes offers Astropad Graphics Tablet for iPad for $9.99. That's $10 off and the lowest price we could find. This drawing app allows you to use your iPad as a graphics tablet for your Mac and is compatible with Photoshop and other Mac creative tools.
iTunes offers downloads of Hexaglyphics Noise Generator for iPad for free. That's $5 off and first time it's been free. It can turn gestures into a wide range of noise sweeps, beeps, zaps/clicks, squarish oscillations, and abstract sounds.