ActiveEarth 

ActiveEarth is a world time clock with a gorgeous day/night merge of NASA's earth images in maps or a globe. It has accurate time zone data for more than 500 cities, atomic time sync, countdown clocks, scalable analog clocks, screen saver, and more!
atomic time clock map globe screen saver astronomical

Emsa Time Synchronizer 

Emsa Time Synchronizer is a very simple but useful time synchronization utility. Users that like simplicity, may indeed like this program. It can continously update time in background and autorun at system startup. Freeware.
atomic time time atomic time synchronization time synchronizer time sync time synchronization utility

ClockWise 

The ultimate time-piece for Windows 95/98/ME/NT/2000/XP - Automate everything! 200-event scheduler, calendar, timer, alarm, stopwatch, time client, 24-city time zone window, dial-up network timer and scheduler - even a useful time/date screensaver!
clockwise time date clock scheduler alarm reminder timer stopwatch calendar sunrise sunset time zone timezone