Atomzeit
To synchronize your PC with the atomtime. Run with a standalone PC or in your network. The Timeserver is high secure with binding IP. You can see the mondphase whil you to synchronize the time. The program is in english with a german manual.
http://www.paehl.de/atomzeit.zip - 499Kb - Download - Screenshot

Sync-It with Atom
Sync-It with Atom is a network time protocol client that calibrates the system time of your computer with a timeserver on the Internet. Features include automatic selection of the closest server, scheduled time synchronization, taskbar tray support and easy-to-use and attractive user interface.
http://www.tolvanen.com/syncit/syncit24.zip - 558Kb - Download - Screenshot

Absolute Time Corrector
Absolute Time Corrector is a Windows 9X/NT/2000/XP/2003 program, designed to provide the exact time to local and network computers based on the time standard set forth by the National Institute of Standards and Technology (NIST). Absolute Time Corrector queries NIST timeservers using the... Once set up the host computer can serve as a timeserver to any size network. ... adjusttime. ... Absolute Time Corrector is distributed electronically over the Internet; free demo version is available at www.
http://www.flexiblesoft.com/downloads/atc.exe - 2Mb - Download - Screenshot