Atomic Clock Service 

PC atomic clock synchronizer with some useful features (time offset, synchronize periods, etc.). This program uses the list of 19 presetting atomic time servers.
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PC Atomic Sync 

It is an atomic clock synchronizer with some useful features (time offset, synchronize periods, etc.). This program uses the list of 18 presetting atomic time servers.
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#1 Atomic Clock 

Atomic Clock synchronizing application with some useful options (skinned, synchronize periods, work as Time Server, import time servers list, etc)
atomic clock sync ntp sntp nist synchronization time internet synchronize daily