I am a Blackberry user but saw a friend using this great new app on his iPad. It has so much content and is so easy to use. Definitely worth checking it out! Free! Can't wait for the Android version so I can use it on my PlayBook!!
I third Camera +. It's my favorite of all photo editing apps. I like Instagram too, especially for the sharing ability, but I don't like that Instagram makes you cut down the size of your image. I like that Camera + doesn't make you do that.