The most handy new features in Camera+ are the horizon level, which puts a simple line across your screen so you can take level shots, and live exposure details so you can see what Camera+ is doing under the hood before you snap a shot. If self portraits are more your thing, Camera+ also adds a front facing flash by quickly flashing a white screen in your face.
Camera+ (99¢ on sale, $1.99 otherwise) | iTunes App Store