CLOX 2000 

A superb suite of analog and digital clocks and other timekeeping tools. Featuring timezone clocks, internet time synchronization, alarm, calendar, daylight map and other accessories including stopwatches, countdowns and more.
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iTimeSync 

iTimeSync synchronizes your computer clock with an internet time server which have very accurate clocks, generally synchronized by the harmonics of an atom. (Thus called an Atomic Clock.) iTimeSync is written in Assembly for maximum efficiency.
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TrayDay 

TrayDay: today's date at a glance, in the Windows tray, with handy popup calendar. Can show week numbers to ISO (or your own) standard. A double-click types the date in the format of your choice. Julian Day and Internet Time features.
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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 and convenient interface, it is designed to suit any and all your needs
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Ute 

Ute is a compact assembly language utility with Time Syncing, Window Shutdown control, Wave File playing, Delayed / Controlled Running and Wallpaper Changing capabilities. It is a collection of Sinner Computing utilities.
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AtomSync 

AtomSync is a utility that works in the background and periodically checks your system time against an internet NTP time server or against a computer in your LAN (local network) which runs an AtomSync LAN time server.
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