Windows time server. Supports NTP and SNTP protocols. Easy to install.

PresenTense Time Server is a high performance Windows time server supporting NTP and SNTP protocols. You can use PresenTense Server to synchronize your PC to a primary time source such as an atomic clock on the internet or an inhouse GPS reciever and offer time services to clients on your local area network. Most leading GPS and Radio hardware clocks are supported via the serial port. Now supports Free Run so that you maintain accurate time even if your internet connection goes down or your reference clock fails. New algorithmic filters added to achieve even higher accuracy when using an unreliable internet connection. Installation automatically configures default time servers so in most cases, you have an operational time server after the install is complete. Syslog server support added in version 3.9. Fallback to an internet based time server if local GPS hardware fails.