iPhoto is among the standouts. Apple's photo-organization software really comes to life on the high-def iPad, where users will be able to sharpen their photos with new features. One detects the horizon in a landscape photo and, with the tap of a finger, will make it perfectly level. Another lets users rub a finger over a section of a photograph to lighten, darken or soften it. It makes photo editing more hands-on and intuitive than before.