It is an atomic clock synchronizer with some useful features(time offset, etc.)

XJ Timer mostly use for important meeting.

ATS is a full-featured time server, which works as windows service.

FG Time Sync can automatically check the time to keep your PC's time accurate.

Controls and configures an installed NTP service with a userfriendly GUI

cmxSyncTime synchronizes your PC clock to the NIST internet servers

It can help you set the plan easy on the computer.

Synchronizes your PC clock with public time servers on the Internet.

Internet Time Synchronization using TIME and SNTP as a client and server

Chronos is an utility for people who need their computers to use EXACT TIME.