I just found this app seems it has been out for a while with the last update in 2010, but I think it has some creative opportunity, even though it has some bad ratings. I have just played with it a little this morning but the image created with the split mode function was fun. It lets you take two shots and divides the frame in half. Can't say I have seen another app with this functionality. I think the action quad mode could be fun too.
The images below follow the sequence used to get the look on the shot above.
|1. Original Capture|
|2. Original capture processed Sketch Agent and in DynamicLight|
|3. Run through Photocopier for texture|
|4. Opened in Iris to brighten and saturate|
|5. Applied another filter in DynamicLight|
|6. Tried PopCam for border and Sepia tone|
|7. Blended the PopCam image #6, with image #5 in Iris and applied black border in Iris|