I'd have as much fun with an idiot proof iPhone camera but I am. I finally made the leap from a hand-me-down iPhone to the 4. Along came the discovery of some nifty camera applications through word of mouth. Downloading the applications were a breeze too, via iTunes. As most are relatively cheap acquisitions, I am not complaining. Thus far, I have Hipstamatic, Pudding Camera, Plastic Bullet and Retro Camera.
These were the photos taken with the following applications: - HIPSTAMATIC
The application that I like the most is PLASTIC BUBBLE (It allows you to manipulate photos taken with other cameras. Here's a series taken with my Canon dSLRs and processed with Plastic Bubble).