From Markus at Celestial Dynamics comes this beautiful iPhone/iPad/Android app, Cosmic Watch:

The Cosmic Watch is an interactive 3d tool. You can use it as a realtime worldclock, time travel machine, an astrolab, an antikythera mechanism, an orrery, an armillary sphere, or an astral-chart generator.

The unique thing about the clock face is its ecliptic view around the planet. The complex mechanism of telling time is at the touch of your hands with the Cosmic Watch App.