1)   Skin Clock 1.8
SkinClock is the replacement for standard tray clock having skinned interface. You are able to select between multiple differently styled skins. It lets you showing date and calendar, adjust and synchronize time, create and run reminders

 2)   1st Clock 5.0
See the date as well as the time from multiple time zones in your taskbar clock in a way you want. Monitor PC performance. Show two-months calendar in one click. Never miss important events with reliable alarms! Keep an exact clock with atomic time.

 3)   ActiveEarth 2.0
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!

 4)   Absolute Time Server 6.1.730
ATS is a full-featured time server, which works as windows service and is fully RFC-868 and RFC-2030 compatible. Absolute Time Server acts as a background process, has very low system resources consumption, and it can be started before user logon.

 5)   Chronograph 5.1
Chronograph is a simple award-winning program which keeps your computer's clock accurate using atomic time servers. It is able to replace the standard Windows clock in the system tray and uses Winamp skins for thousands of different styles.

 6)   Emsa Time Synchronizer 1.0.46
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.

 7)   1Click Time Synchronizer 1.0
1Click Time Synchronizer helps you keep your system time always accurate by synchronizing it with the highest precision atomic clock servers. The program features attractive skinnable interface and can work as a local time server on your LAN.

 8)   Atomic PC Clock 1.2
Atomic PC Clock allows you to make the most of your time! By using Atomic PC Clock, you will not be late for important appointments. Atomic PC Clock's intuitive user interface is ideal for both the novice and expert PC user.

 9)   Alt Clock Synchronizer 1.5.017.1
ACS - atomic clock synchronization utility. Very simple and very usable. At the same time, many adjustable properties does the program very convenient in use. Forget about clock problems. With ACS you always will be assured in their accuracy!

 10)   Chronograph Lite 4.1
Chronograph is a simple award-winning program which synchronizes your local PC clock using atomic-time servers. It has an easy-to-use, nice-looking interface, so you can adjust your time with just two mouse clicks.

 11)   Atomic Clock Service 3.1
PC atomic clock synchronizer with some useful features (time offset, synchronize periods, etc.). This program uses the list of 19 presetting atomic time servers.

 12)   Atom Time Synchronizer 3.7.9
AtomTime Synchronizer is a useful and handy utility to keep your PC clock accurate. It can periodically check and synchronize your computer time with a NIST atomic time server, or synchronize time between computers, and can also act as a time server

 13)   Desktop Atomic Clock 2.23
Desktop Atomic Clock is a program to synchronize your computer clock with an atomic clock over the Internet. You can choose to synchronize the time automatically or use the manual mode

 14)   1st Atomic Time 2.12
1st Atomic Time adjusts your system time with Internet atomic time servers. You can pick the fastest and most reliable servers and adjust the time automatically at regular intervals. 1st Atomic Time can work as a time server for any network.

 15)   Admin Http Time Sync 1.1
The main purpose of the program is synchronizing PC clock using HTTP protocol. It works as NT Service so can be used under user login with restricted rights.

 16)   Atomic Clock Sync 2.7.0.3
This freeware Atomic Clock Sync utility will keep your local computer up-to-date with the exact current time from an atomic clock server.

 17)   HiClock Pro 3.19
HiClock Pro gives you an easy and thorough way to synchronize your system clock to the exact time using the Internet. It queries one of the National Institute of Standards and Technology timeservers, which then returns the correct standard time.

 18)   Atomic Time Synchronizer 4.0
Atomic Time Synchronizer is a useful and handy utility to keep your PC clock accurate. It periodically checks and synchronizes your computer clock with NIST atomic time servers, or synchronizes time between computers.