GUI toolkit that actually looks like it's been designed to work well on a touchscreen. Button and sliders are tangible. Only rotating elements are incredibly large and easy to manipulate. A lot here to like.
iPhone Flash Selector
Like the GUI of Daily Routine app
impressionist user interface
Dribbble - Yellow Counter by Rodolfo
Friends List V2
Slide-out navigation UI for iOS by Aurélien Foutoyet