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.
Laundry Master App - iOS by Zahir Ramos
Pounce: 1-Tap shopping app
Discovr Music for iOS - Screencast
Discovr Apps for iOS - Screencast
Tweetbot - a Twitter client