In this thread, we will post some examples of the interface, that we developed for QCar. Unlike many front-ends, QCar is not primarily designed for a touch screen (although it does support it), but for a rotary controllers of which 3Dconnexion's SpaceNavigator is our favourite.
Here is a short movie, demonstrating use of the controller:
And here a somewhat longer movie, showing the overal interface look and the most common activities (music and movie playback, text entry etc.)