A standard synchronizing program will not work if NTP (Network Time Protocol) is suppressed by a proxy or a firewall.
This synchronizer uses plain access to WWW pages that show standard GMT time. It will work if you have access to Internet Web pages.
The unique Time Offset feature of the program allows setting up your PC clock to gain or to lose for a specified interval. Many our users value this feature greatly. Clock in your PC needs to be corrected only several times a month. And it is this fact that defines the way the program works: the program runs when Windows starts, checks whether synchronization has been done this day already, and stops immediately if so. Otherwise the program checks for Internet connection, then tries to synchronize your clock and ends its work if succeeded. So as you see mostly the program is idle and is not wasting resources of your PC. Synchronization is done automatically while you are receiving your e-mail or surfing the web and no actions are to be done by you. The program uses three different time sources.

• PC Atomic Sync 3.
  (*) It is an atomic clock synchronizer with some useful features (time offset, synchronize periods, etc.). The main idea of the program is to synchronize your PC's clock in the...

• Trout's Internet Clock 1.6
  Desktop Clock, Scheduler and Time Synchronizer

• PC NP Atomic Sync 2.
  It synchronizes your PC clock using Web access method. This technology makes it fool compatible with proxies and firewalls that can prevent NTP protocol synchronization. And it is this fact that defines the way the program works:...

• SP TimeSync 2.4
  SP TimeSync is a program with multilingual interface which lets you synchronize your computer's clock with any Internet atomic clock (time server)

• Alt Clock Synchronizer 1.5.017.2
  Alt Clock Synchronizer allow to synchronize your computer's clock with precision internet timeservers. Very simple and very usable. At the same time, many adjustable properties does the program very convenient in use. You can adjust Alt Clock Synchronizer to automatic work. Forget about clock problems. With ACS you always will be assured in...

• Chronos Atomic Clock Synchronizer 3.1
  Chronos Atomic Clock Synchronizer is a utility for people who need their computers to use exact time

• Chronos Atomic Clock Synchronizer 4.7.3
  Chronos Atomic Clock Synchronizer is a utility for people who need their computers to use exact time. The program connects to various atomic clock timeservers and synchronizes your internal clock with time provided by these servers. Key...

• Li'l Atomic Clock 1.0.1
  It is well-known that the Windows system clock is everything else than exact

• PC Atomic Sync 4.0
  It is an atomic clock synchronizer with some useful features (time offset, synchronize periods, etc

• Desktop Atomic Clock 2.23
  Desktop Atomic Clock is a program to synchronize your computer clock with an atomic clock over the Internet