Java based LST ClockApplet
jLSTclock, a java based clock with sidereal time display capability, created by Joe Brandt of NRAO.
Note that your computer system clock must be correct for this to give the correct time.
You may want to check your time against the USNO Master clock
Fan Mountain Observatory
Leander McCormick Observatory
Cerro Tololo Inter-American Observatory
Las Campanas Observatory
Kitt Peak National Observatory
Siding Spring Observatory
To find out the local time (and date) visit World Clock
A couple of fun clocks: Human Clock
Day and Night Clock