1st Clock - Add date, alarms, atomic time, time zones, calendar and more to the system clock

#1 Atomic Clock - Skinned atomic clock synchronizing application

Atomic Clock Service - PC atomic clock synchronizer with useful features (time offset, periods, etc.)

Advanced Time Synchronizer - Synchronizes your PC clock with public time servers on the Internet.

Precise Time 2002 - Precise Time 2002 syncronizes your computer's system clock to time servers.

Atom Time Synchronizer - Atom Time Synchronizer - Keep your PC clock accurately synchronized

Tech-Pro World Clock - Desktop clock and calendar with world map showing time in major cities

SelfCron - Use the most accurate atomic clocks of the world to set your windows pc's time