Atomic Alarm Clock

Drive Software Company
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Alert yourself about important events with different alarms and replace your Windows tray clock using different skins. 
Alarm clock that will play a WAV file. It also can run a program, log off, reboot, shut down, or power off. 
Atomic Alarm Clock also an atomic-time synchronizer and advanced replacement for Windows tray clock. 
See the time, seconds, day, date and system UpTime in different skins. 
Displays the time for any of the time zones.  
Over 130 skins are included in the distribution. 

This alarm clock is built into your personal PC and is completely customizable.

http://www.drive-software.com/atomicalarmclock.html