Once ATS is set up, you can have it periodically set your system clock; plus it even has a built-in NTP server so you can synchronize all of your other computers quickly and easily! You can even specify a custom time offset to ensure that it sets your clock just the way you like it

atsi.exe (196KB)

http://www.analogx.com/CONTENTS/download/network/ats.htm

Stay on time! Now you can synchronize your computer's clock to one of the many ultra-precise time servers available on the Internet. You can schedule periodic automatic updates, or adjust your clock on demand any time you choose.

ptsync-setup.exe (1.66MB)

http://www.karenware.com/powertools/ptsync.asp

TimeSync is an easy-to-use utility that automatically sets your PC's clock. TimeSync reads the time from the US government's atomic clock in Boulder, Colorado and automatically adjusts for your time zone and Daylight Saving Time.  TimeSync runs under Windows 9x/ME, NT, 2000 and XP. TimeSync is 100% ad-free, spyware-free, virus-free and just plain free!

timesync.zip (612KB)

http://ravib.com/timesync/