There is an app called Marblecam on my ipod that I'm slightly obsessed with. Ok maybe more than slightly obsessed. I can't stop playing around with it! It basically makes it look like there is a glass marble on the picture. Some of them I added a filter.
Curtain in my living room.
Sprinkles on a yummy donut.
Spokes on a bicycle tire.
I have so much fun using this app and think it adds something different to my photos.