A bunch of apps on the iTunes store have gone free! Both The Verge and 9to5mac have listed them all but here are my favorites.

Day One - a beautiful journaling app for iOS also available for $9.99 on Mac.

Over - add text with a beautiful selection of fonts and artwork to your pictures then and only then do they become Facebook worthy =)

Barefoot World Atlas - a great map with animations and world facts just like what we could have used in 7th grade geography joust!

and of course the $19.99 app Traktor DJ either the iPhone or iPad for free!