There are some 6,500 camera apps, and a recent column by David Pogue points you to the best. These apps, most of which are free or low cost, can transform the iPhone's mediocre camera into a useful tool. He covers apps that you simply use in place of the iPhone's Camera app and give you much better quality. For example, the many features of Camera+ ($1.99) include image stabilization. The app ingeniously uses the iPhone's motion sensor to sense when your phone is still for an instant and then snaps the photo, giving your photos greater clarity. He also covers filter apps and specialty photography apps, such as time lapse and panorama apps.