1)   Clock Tray Skins 4.2
Advanced replacement for standard Windows tray clock. See the time, day, date and system UpTime in different skins. Displays the time for any of the time zones. Over 100 skins are included in the distribution. It's also an atomic-time synchronizer.

 2)   Atomic Alarm Clock 5.85
Alert yourself about important events with different alarms and replace your computer tray clock using different skins. Computer Alarm Clock that will play any MP3 file. It can also run a program, log off, reboot, shut down, or turn off.

 3)   Desktop Tray Clock 2.6
Substitution for a standard tray clock on windows desktop using different skins, over 100 skins are included in the distribution. Desktop Tray Clock also is a software alarm clock, it can create warning messages using MP3, WAV or open an application