aClock Pro

  aClock Pro is a desktop clock with useful features like world time clock, clock synchronization, alarms, pop-up reminders and countdown. With the world time clock, you can view the current time in any part of the world (150 pre-defined countries and over 300 cities). The alarm clock features custom alarm sounds and pop-up reminders. View an analog or digital-style display. The countdown timer can be set from 1 second up to 99 hours.

aClock Pro can keep your computer up-to-date with the exact current time. It will connect to one of the National Institute of Standards and Technology (NIST) atomic clock servers and synchronize your computer's time via the Internet.