Atom Timer

First, it is atomic clock software, which means it updates your computer's system clock using the National Institute of Standards and Technology atomic time servers (NIST server). You can synchronize your system clock with these atomic time servers.

Second, Atom Timer offers a computer alarm clock with a mp3 alarm clock. It's convenient to set up the alarm to use mp3, wav, midi files, and more. You can also set a timer to automatically shutdown your computer at a specified time.