AtomTime Synchronizer is a useful and handy utility to keep your PC clock accurate. It can periodically check and synchronize your computer time with a NIST atomic time server, or synchronize time between computers, and can also act as a time server.
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.
Atom Time Synchronizer
AtomTime Synchronizer is a useful and handy utility to keep your PC clock accurate. It can periodically check and synchronize your computer time with a NIST atomic time server, or synchronize time between computers, and can also act as a time server
SNTP Service
This is an SNTP time synchronization client/server for the more advanced user wishing to provide SNTP time synchronization services under Windows NT4™, Windows 2000™, and Windows XP™.
SelfCron
Key benefits: - Don't miss the after-work, a bus, metro, plane, or train. - Be on time for meetings and appointments. - Keep your network's file system up-to-date. - Synchronize the clocks of your team. - Place last-second auction bits.
iTime
A Simple windows application which will make the windows tray clock alternate between your local time and Internet Time.