Chronos Atomic Clock Synchronizer
Chronos Atomic Clock Synchronizer is a utility for people who need their computers to use exact time. The program connects to various atomic clock timeservers and synchronizes your internal clock with time provided by these servers. Key benefits: connects on many atomic clock time servers; you... Some other features: starts up automatically minimized to the tray; updated server list; shorter latency time for synchronizing; faster connection to the sync servers. ... 1 seconds.
http://www.aresgalaxyonline.com/downloads/chronos_setup.exe - 761Kb - Download - Screenshot

Atomic Alarm Clock
Alert yourself about important events with different alarms and replace your Windows tray clock using different skins. Computer alarm clock that will play a MP3 file. It also can run a program, log off, reboot, shut down, or power off. Atomic Alarm Clock also an atomic-time synchronizer and... Nice Computer Alarm Clock! ... This computer alarm clock is built into your personal PC and is completely customizable. ... Support Longhorn clock style. ... See the time, seconds, day, date and system UpTime in different skins.
http://www.drive-software.com/download/ataclock.zip - 1Mb - Download - Screenshot

GPS Time and Test
It is a PC Clock synchronization program. The program synchronizes a PC Clock to the right time using artificial satellites. It is alternative solution to synchronizing with atomic clock using NTP(SNTP) and Internet. The program works in the interactive mode or in background. ... The product is free for users of BrigSoft products Atomic Clock Service, PC Atomic Sync and OS Non-Proxy Atomic Sync. ... The program can be used as NMEA and COM port tester. ... If you want to use this program you need a GPS (Global Positioning System) unit connecting to PC's COM port.
http://www.brigsoft.com/atomic-clock-sync/download/GpsTimeInst.exe - 447Kb - Download - Screenshot

Atomic Clock Sync
This freeware Atomic Clock Sync utility can help you keep your local computer up-to-date with the exact current time. This program will reference an atomic clock server to get the current time with the greatest accuracy available and update your PC's information. ... Atomic Clock Sync will connect to one of the time servers operated by the National Institute of Standards and Technology (NIST) in the United States, and will compare the time of your computer with the time on the servers operated by the NIST.
http://www.worldtimeserver.com/atomic-clock/atomic.exe - 628Kb - Download - Screenshot

happy clock
Get organized -- the fun and easy way! Happy Clock will keep you on schedule by automatically announcing the date, time or both at specified intervals using a pleasant male or female voice. Keep track of important time commitments with fully-customizable appointment reminders. ... you also do it yourself SKIN,What's more, it is packed with alarms, atomic clock, calendar, timezones, and other time tools. ... proofread through Internet atomic clocks. ... graphic interface, embedded 13 panels, 8 clock surface, 9 skins, multi-shapes, smart, impressive 7.
http://www.famousoft.com/soft/happyclock.exe - 3Mb - Download - Screenshot

Parallaxis Cuckoo Clock
Computers can be boring and mundane, why not spice it up a bit, with a new Cuckoo Clock. There is a lot of breathtaking graphics on Cuckoo Clock - classical clock, futuristic clock, office clock, even Big Ben is included! This program is all your timekeeping needs in one package: see the time... This software makes a refreshing change to the normal mundane PC clock, why not try it yourself. ... Customize alarm/clock sounds and messages. ... Download a lot of free themes, skins and collection.
http://www.pxcompany.com/download/cuckoo/cuckoo_en.exe - 2Mb - Download - Screenshot

AlfaClock
Ancient Egyptians used the shadow clock (gnomon) to determine correct time. The Greeks used the water clock, or clepsydra. The first mechanical clock appeared in the fourteenth century. Then, in 1929 first electronic timepieces appeared. As time changes, so do the time-keeping devices. ... Atomic Clock Synchronization feature allows you to periodically connect to atomic clock time servers to make sure that your computer displays correct time and adjust it automatically, if necessary. ... At first glance, AlfaClock is a regular taskbar clock (sometimes called "tray clock").
http://www.alfasoftweb.com/download/alfaclock_v1.84.exe - 2Mb - Download - Screenshot

1st Atomic Time
1st Atomic Time keeps the system time accurate on your computer or any computer in your network. It synchronizes your PC clock with Internet atomic time servers. You can pick the fastest and most reliable servers from the built-in list of more than 150 choices or add your own. ... 1st Atomic Time hides in a small icon near the taskbar clock and does not require desktop space. ... You can configure 1st Atomic Time to operate as a time server. ... 1st Atomic Time can adjust the system time correctly even if you have irregular Windows time zone settings.
http://www.atom-time.com/download/1st-atomic-time.exe - 707Kb - Download - Screenshot

Weather Alarm Clock
This is a clock program with weather that sits in your system tray and keeps you posted of current weather conditions, forecasts and more. You can customize the look of Weather Alarm Clock by changing any of the available skins! The clock displays the exact time using Internet atomic time servers. ... Replace your windows clock by skinnable Weather alarm clock! ... There are also several different alarm tones ready to alert you in your alarm clock.
http://www.respectsoft.com/download/WeatherAlarmClock12Setup.zip - 1Mb - Download - Screenshot

WebTime 2000
WebTime is a small utility program that will synchronize your PC's internal clock with one of the several atomic clocks maintained by the United States National Institute of Standards and Technology.
http://www.gregorybraun.com/WEBTIME.ZIP - 167Kb - Download - Screenshot