Reallusion Inc. has Big Lens (iTunes Link) for the iPhone, iPod Touch, and iPad in the iTunes App Store for FREE (regularly 99-cents) for a limited time.

Whether you’re a novice or pro photographer, Big Lens is your secret weapon when taking shots with the iPhone.
Big Lens gives you the ultimate in focus and filter tools for your iPhone. Simply focus where you want, with Reallusion’s Big Lens which turns everyone’s iPhone into a professional SLR camera. Snap a picture and then edit it like magic by setting the aperture, changing periphery blur levels, and adjusting background light to create a Bokeh effect with just a few gestures.