There are a lot of apps that let you take a picture using the iPhone's built-in camera... but I recently discovered Photo Double Fun which lets you use BOTH the front and rear cameras, simultaneously, to take photos as well as videos! Why is this so cool? Suppose you want to document that you were at a specific location, seeing something in person. The Photo Double Fun app combines the two images into one, and if you use their free version, it adds a watermark and you can only store a couple of photos at a time, without upgrading.
