As of July 10th, Apple's iOS App Store is 5 years old. And what happens at birthdays? Gifts, that's what! In this case, Apple are the guys being generous.
Now, the sale isn't actually official (yet), so there isn't a definitive list of which apps are free - we do know that some of these apps are games though, and good ones at that.
Some of the known games are as follows: Sword & Sworcery, Infinity Blade 2, Where's My Water, Tiny Wings and Badland.
So... why are you still here? Get the App Store loaded!