iTimeSync

  iTimeSync synchronises your computer clock with an internet time server which have very accurate clocks, generally synchronised by the harmonics of an atom. (Thus called an Atomic Clock.) You can set up to five different time servers, which can be automatically checked in turn on a failure to connect. It can also be set to auto-start in a non windowed mode with Windows and attempt a time sync and exit. iTimeSync has logging functions and a positive or negative time offset can be set if you like your clock to be fast or slow.