QuadCamera by Art&Mobile (buy on iTunes)
QuadCamera takes 4-8 serial photos and combines them into a single strip. Settings include shutter mode, layout, and color vs. black and white. There is even a Flickr group with samples, which all look pretty cool. I’ll be playing around with this over the weekend.
Just bought this, haven’t played with it alot, but I do dig it so far.
Source: 9-bits