Free to try; $19.95 to buy
Windows Vista, Windows 95, Windows Me, Windows XP, Windows 2000, Windows NT, Windows 98
Publisher's description of Chronograph
This program works with the atomic time servers of the National Institute of Standards and Technology to synchronize local PC clocks. It has a nice-looking user interface and offers some useful features that make the process of time synchronization fast and comfortable. You can work in Manual, Periodical, or Wait for Connection modes. Dial-up networking and proxy support are included. Chronograph can work as a local time server in LANs. This major update includes SNTP protocol support, HTTP proxy support (with authentication), and a new, modern interface.