Alert yourself about important events with different alarms and replace your Windows tray clock using different skins.
Computer alarm clock that will play a MP3 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, Datum and system UpTime in different skins. Displays the time for any of the time zones. Over 100 skins are included in the distribution. Support Longhorn clock style.

This computer alarm clock is built into your personal PC and is completely customizable.
Nice Computer Alarm Clock!