SP TimeSync 

SP TimeSync is a multilingual program which lets you synchronize your computer's clock with any Internet atomic clock (time server). It uses a high precision network time protocol (NTP) which provides accuracy of several milliseconds.
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Time Sync Pro 

Time Sync Pro is an application that connects to one of the many atomic clock web servers, downloads the time to your PC and adjusts it. Time Sync Pro has many features including the automatic adjustment of your computer clock.
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