Free atomic time sync utility software for windows

Atomic TimeSync - Syncronize time from NIST How do you set the time in your house? I dont mean do you know how to set the clock on your VCR, but what TIME do you actually enter? Do you just use the normal best guess approach that practically everyone else does? If so, then get ready for the real deal - set your clock using THE timekeeping source, the National Institute of Standards and Technology.
NIST keeps the primary frequency (time) standard for the United States, and operates a special server using the Network Time Protocol (NTP) to allow Internet users to get the time from them! Of course, if youre not based in the US, dont worry, you can go to the NTP Homepage and get a listing of servers worldwide, so you can pick the one closest to you.
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 (I like my clocks 10 minutes fast, so Im always a bit early).

Karen's Time Sync 1.1.4 provides an extensive feature set designed to synchronize your computer's clock to one of the many ultra-precise time servers available on the Internet.

Synchronize system time on your PC with highest precision atomic clock servers 1Click Time Synchronizer is a utility that helps you keep your system time always accurate.
1Click Time Synchronizer can be used to synchronize the system time with the highest precision atomic clock servers on the Internet using the Network Time Protocol.
System requirements:
- Pentium 166 MHZ or above