White Stripes by Valik Boyev
Controlled - GUi - Graphical User Interface - GraphicRiver Item for Sale
Futurico User Interface Pro by Vladimir Kudinov, via Behance
Dark Led UI kit by Pixeden
Minimal Light User Interface Freebie
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.
Button states in red