Alphabet City - TVS by ranganath krishnamani, via Behance
Meipai by ididi
Maybe that R ends up a bit small, but this iOS app icon has otherwise got some character.
Base app icon by Jackie Tran
It's an icon that can update to reflect app state! - Flip clock Icon by Brady Sammons
Using the shape of your product to your advantage always works in a positive way. Also the neon blue can also draw a viewer's attention towards it over other icons.
iPhone App Icon
iOS Game icon by Catalin Fertu for BigMug