The Vista Clock freeware is pretty cool looking. And it comes with some nifty extras, like chimes, a countdown alarm, stopwatch, world time and atomic level accuracy. All of it activated by either right clicking or double clicking on the watch face and buttons. Neato.
Vista Clock is a FREE Desktop Analog/Digital clock with Chimes, Current date, Countdown, Alarm, Timer, Uptime, Stopwatch, World Clock, Atomic Clock