NetTime - nettime is a time & attendance software solution.
Date Reminder - Date Reminder reminds you of recurring or nonrecurring events, like birthdays, bills to pay...
Meinberg NTP - NTP client and server download for different operating systems.
AboutTime - AboutTime is a superior source of time for your computer.
Dimension 4 - The fastest and easiest way to synchronize your Windows clock.
Desktop Atomic Clock - Neat atomic clock time sync tool with multiple time zone support