NetTime - nettime is a time & attendance software solution.
Meinberg NTP - NTP client and server download for different operating systems.
Date Reminder - Date Reminder reminds you of recurring or nonrecurring events, like birthdays, bills to pay...
Chrony - Chrony is a pair of programs which are used to maintain the accuracy of the system clock on a...
Desktop Atomic Clock - Neat atomic clock time sync tool with multiple time zone support
Dimension 4 - The fastest and easiest way to synchronize your Windows clock.