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... Displays the time for any of the time zones. ... Support Longhorn clock style. ... This computer alarm clock is built into your personal PC and is completely customizable. ... Nice Computer Alarm Clock! ... See the time, seconds, day, date and system UpTime in different skins.
http://www.drive-software.com/download/ataclock.zip - 1Mb - Download - Screenshot

ClockDummy!
ClockDummy! is an atomic clock, which can say the time with a real human voice, and enhance your standard taskbar clock with custom graphics, month, and seconds. ClockDummy! also keeps your clock updated to the exact second via an atomic clock Internet server for any time zone and location, and... lets you select from a range of predefined styles for how your taskbar clock should look, or select your own graphics and fonts to use. ... is the ultimate addon to the standard taskbar clock and it's easy to use!
http://www.dummysoftware.com/ClockSetup.exe - 1Mb - Download - Screenshot

Attache Transparent Clock
Transparent desktop clock with fully customizable shape, alarms, and atomic time. It may have a digital or analog clock face of various colors, sizes and shapes - you may even set individual parameters for each application you run, so that the clock were clearly visible in any environment. ... Synchronizing time with atomic clock servers. ... The clock comes together with a screensaver that decorates your screen and helps you keep up with the time. ... This state-of-the-art piece of software may be used as a beautiful replacement for standard Windows digital clock or as an...
http://www.softdemon.com/attclock.zip - 1Mb - 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 can adjust the system time correctly even if you have irregular Windows time zone settings. ... You can configure 1st Atomic Time to operate as a time server. ... You can setup 1st Atomic Time to automatically adjust the time at specified intervals.
http://www.atom-time.com/download/1st-atomic-time.exe - 707Kb - Download - Screenshot

Ace Clock XP
AceClock is a skinable transparent desktop clock with organizer and stickers, skins support, atomic internet time synchronization, fully customizable see through display with tooltip and convenient interface, it is designed to suit any and all your needs. ... You will get voice time spelling in multiple languages, powerful alarms with templates, upcoming alarms, quick reminders, countdown and stopwatch timers, universal calendar with date calculator, different time zones support with reliable atomic clock synchronization and much, much more.
http://www.aceclock.com/files/aceclockxp.zip - 2Mb - Download - Screenshot

Horas
With the world becoming more connected, people are following world events, doing business, talking to family, and creating friends internationally. Horas is a world clock that helps you keep track of time in different cities by showing you clocks for multiple time zones. ... There are many options available such as the automatic adjustment of daylight saving changes, Swatch Internet Time support, analog and digital displays, auto-hiding of the clocks, custom date and time formats, custom fonts, custom backgrounds, and time zone information downloading.
http://www.basta.com/Software/SetupHoras.exe - 1,023Kb - Download - Screenshot

DS Clock
DS Clock is a digital desktop clock that displays variable date, time, and time zone information built from the format string. The program allows you to fully customize its look and feel, and can synchronize your computer's clock with Atomic Time Servers. ... DS Clock also allows you to show a tool tip window with upcoming reminders of Calendarscope and supports Swatch Internet Time and Stopwatches. ... You can select any combination of date and time, pick custom colors and fonts, set custom sound to play at the top of the hour, etc.
http://www.dualitysoft.com/download/dsc16r.exe - 869Kb - Download - Screenshot

Trouts Talking Internet Clock
* Liven up & personalize your desktop with an Analog Clock face using any picture you like * Add an analog clock to your system tray * Remember Birthdays, Anniversaries, Appointments, Meetings etc with a Message, Song, Multimedia Presentation or a Microsoft Agent character * Set applications to... * See what time it is somewhere else in the World - up to extra individual 10 Time Zone Clocks * Clocks can be any Shape, Size, Color, Effects... ... * Dynamic Icons -Trout's Internet Clock's icons are functional clocks.
http://chemware.co.nz/tic23_sw.exe - 947Kb - Download - Screenshot

The Time Machine
Professional looking clocks, skinable calendar, atomic synchronizer and organizer. The Time Machine is a massive set of components and functions, completely covering all the tasks of managing your computer clocks. That includes managing appearance of clocks, display of various time zones,... - Highly customizable digital and analog clocks with a powerful skin engine; - Integration of the clocks in a Windows environment.
http://www.atlantsoft.com/utils/store/ttmsetup.zip - 4Mb - Download - Screenshot

ClockWise
ClockWise is the ultimate time utility for Windows. Includes a digital clock, time client, calendar, timer, stopwatch, dial-up network timer, scheduler, and reminder system. You can automate everything! You can schedule up to 200 external or built-in events! ... Built-in options include system reboot, shutdown, automatically setting the system time to the atomic clock at NIST or any Internet NTP server, connection or disconnection from the Internet and Active Desktop refresh. ... The 24-city time zone window now has over 720 cities to choose from, and ClockWise even includes a useful...
http://www.rjsoftware.com/files/CW_330.zip - 761Kb - Download - Screenshot