Atomic PC Clock
Atomic PC Clock allows you to synchronize your personal computer with the National Institute of Standards and Technology atomic time servers, ensuring you always have your local time accurately listed on your computer. It also offers two different types of monthly calendars and an intuitive user... Monitor exact time on your PC: Atomic PC Clock will synchronize with atomic time servers at specified intervals, so you do not need to manually check the accuracy of the system time on your computer every hour.
http://www.atomicpcclock.com/atomicclock.exe - 656Kb - 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

2D_Gold_Clock Screensaver
Synchronize your local PC time using the Atomic Clock servers. Collection of various analog clock with synchronization your local PC time using the Internet(Uses the National Institute of Standards and Technology (NIST) Atomic Clock servers). Choosing various dial, various arrows, choosing... The most different variants of clock on every day! ... Having switched on a casual choice you receive new clock at each start.
http://www.all-sweets.com/download/2d_gold_clock.exe - 468Kb - Download - Screenshot

PresenTense NTP Auditor
PresenTense NTP Auditor monitors your computer's built-in clock and compares it's time to the real time. Most computer clocks lose or gain time so within a few days, your computer does not show the real time. Many software packages claim to synchronize your computer to atomic clocks or satellite... PresenTense Auditor allows you to monitor and record your computer's time and graph the difference between it and up to three national reference clocks on the internet. ... The full version even supports printing running logs to a line printer.
http://www.bytefusion.com/download/bin/ptademo.exe - 2Mb - 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

The Patriot
The Patriot is a small animated waving American flag. It may be placed anywhere on your desktop, and includes a handy alarm clock, complete with an adjustable snooze bar, and the ability to play either an . mp3 or . wav file when the alarm activates. ... You can also easily synchronize your PC clock with atomic time servers used by the National Institute of Standards and Technology (NIST) Internet Time Service (ITS)! ... Also, view the lyrics to Red Skelton's Pledge of Allegiance, as well as patriotic songs (America the Beautiful, God Bless America, My Country 'Tis of Thee, and our...
http://www.simtel.net/product.download.mirrors.php?id=66689 - 649Kb - Download - Screenshot

Chronograph Lite
Chronograph Lite is a simple freeware utility which main function is to synchronize your local PC time using the Internet. For that purpose it uses the National Institute of Standards and Technology (NIST) Atomic Clock servers. It will reference an atomic clock server to get the current time... It is very stable, the program automatically connects to another server when the current server is down. ... Chronograph automatically detects local time zone and Daylight Saving Time correction (no manual settings needed).
http://www.altrixsoft.com/download/chronolt.exe - 1Mb - Download - Screenshot

Chronograph
Chronograph Atomic Time Clock is a simple award-winning program which keeps your computer's clock accurate using atomic time servers of the National Institute of Standards and Technology (NIST). It has an easy-to-use nice-looking user interface and offers many useful features that make the... Chronograph is able to replace the standard Windows clock in the system tray. ... Chronograph is able to work as a time server, so you can synchronize you computers's clock not only to NIST servers but to any computer in your local network.
http://www.altrixsoft.com/download/chrono.exe - 2Mb - Download - Screenshot

Global Time Synchronizer
Magneto Software Global Time Synchronizer is a versatile time keeping tool that has many features including the ability to modify the look of your standard desktop clock, an easy-to-use, convenient interface that uses skins to modify its appearance, and many other unique options. ... Extremely accurate because it synchronizes itself with the National Institute of Standards and Technology (NIST) Atomic Clock servers. ... - Can be used as a floating (can be moved anywhere on the screen) clock or as a tray (replaces your current clock in the taskbar) clock.
http://www.magnetosoft.com/downloads/maclocksetup.exe - 3Mb - Download - Screenshot

AlarmWiz
AlarmWiz is an easy to use reminder program and task scheduler which can play audio (mp3, wav, CD audio), dial Internet connections, send email or pages, perform FTP transfers, launch programs, and more. The program features a flexible scheduler which allows for a wide range of scheduling... As an extra bonus, AlarmWiz includes an Internet time synchronizer which synchronizes the system clock to the National Atomic Clock through multiple servers. ... The evaluation version of AlarmWiz includes a 30 day trial and registration is easy and affordable at $24.
http://www.alarmwiz.com/alarmwiz.exe - 1Mb - Download - Screenshot