This is just a basic heads up display application with a bit more info than the other ones on the Windows Phone marketplace. It displays your current Speed, direction and time in both regular display and a HUD mode (where it flips the image vertically). To enable hud mode simply tap the screen. To switch back, just tap the screen once more. This application makes use of the GPS for speed and direction, and the internal system clock for the time.
This app is currently in beta stage, can be tested from here.