Atomic Clock Sync is described as 'utility can help you optimize how often Windows references an atomic clock server, such as the atomic clock servers operated by the National Institute of Standards and Technology (NIST) in the United States' and is an app. There are more than 10 alternatives to Atomic Clock Sync for Windows. The best alternative is NetTime, which is both free and Open Source. Other great apps like Atomic Clock Sync are Time-Sync, Atomic Clock Time Synchronizer, AboutTime and TimeSync.
Atomic Clock Time Synchronizer is a useful and handy utility to keep your PC clock accurate. It periodically checks and synchronizes your computer clock with NIST atomic time servers, or synchronizes time between computers.
AboutTime is a superior source of time for your computer. As a time client, it will acquire time from the Internet with great accuracy, and as a server it will provide four kinds of time signals to other computers on your local network.
Neutron is a very simple and small time synchronizing program that retrieves the accurate time from one of several specialized time servers on the Internet. Once the network time has been retrieved the program can set your computers clock to match it.
Desktop Atomic Clock is an atomic clock time sync software designed to keep your computer clock always accurate by synchronizing it with an atomic clock NTP server over the Internet. You can choose to sync the time automatically or to use the manual mode.
Network Time System is a time sync software package containing NTP Server and NTP client apps for Windows that provides a precise tool for synchronization of all devices on the network with zero configuration installation.