Always On Time is a Windows Internet utility that will connect to one of a dozen public atomic time servers and fetch the current atomic clock time value.
License:Shareware, $7.95 to buy Size:578 KBLatest Update:2009-10-29
Atomic 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.
License:Shareware, $39.95 to buy Size:2.7 MBLatest Update:2013-10-10
This freeware utility helps you configure Windows to optimize how often it references an atomic clock server to keep your local computer up-to-date with the exact current time. Provided free by WorldTimeServer.com, home of accurate times worldwide.
License:Freeware, $0 to buy Size:890 KBLatest Update:2012-09-25
PC On/Off Time graphically displays the usage time for your computer for the last 3 weeks without having to start any logging (uses Win 8/7/Vista/XP/2000 built in feature). You can see at what times the computer was on or off in a simple overview.
License:Freeware, $0 to buy Size:385 KBLatest Update:2012-10-24