Network Time Protocol

• NetTime  -  http://sourceforge.net/projects/nettime
  NetTime is a simple time synchronization client for Windows 95/98/NT/2000. Its main claim to fame is that it is small, simple and unobtrusive. And, of course, it's free software. The best NTP software for Windows I've seen so far - highly recommended.
• Computer Time Synchronization (from GeodSoft Website Consulting)  -  http://geodsoft.com/howto/timesync/
  The pages says it's "A Beginner's Guide to Network Time Protocol (NTP)", but the depth of information makes it a complete NTP reference site with information on what NTP is, and how to implement on both Unix and Windows.
• Time Synchronization Server Info  -  http://www.eecis.udel.edu/~ntp/
  Website containing all documentation and links for the proper NTP software. If you want the real McCoy, or official documentation, then this is the site to start at.
• Public NTP Secondary (stratum 2) Time Servers  -  http://www.eecis.udel.edu/~mills/ntp/clock2.htm
  The list of public level 2 NTP time servers available for public access under stated restrictions. Each entry gives the country code, state (US only), host name, Internet address, approximate location and geographic coordinates (if available), synchronization source (stratum, type of radio or satellite receiver and host type), suggested service area, access policy (as notified) and responsible person name and e-mail address.