TimeCube is an OpenGL demo that renders a small rotating cube, displaying the current date and time, directly on your desktop. Common effects are used: specular highlights (trop fort les gars!!!!), realtime bump mapping (le truc qui tue!!!) and cube map reflections (là ça explose tout!).
You can grab this software gadget here: TimeCube Demo.
The demo does not eat cpu cycles so you can leave it runing somewhere in your desktop….