| AnalogX - Atomic Time Sync: Queries the NIST NTP server to set the computer clock to the exact time. |
| AtomSync: A background utility that periodically checks a PCs clock against an internet NTP time server or against a computer in a LAN (local network) which runs an AtomSync LAN time server. |
| Beagle Software: Software and hardware to keep computer clock synchronized to the Atomic Clock over the Internet. |
| Chrony: A Unix-based NTP implementation specifically written to be suitable for computers with dial-up connections to the Internet. |
| CHU Time Synchronization for Linux: Software to synchronize a Linux system to the Canadian CHU shortwave station. |
| Clocks and Time: Time Software for PCs: Lists PC based software for time setting and synchronization, clock rate correction and time display. |
| FACTS: A freeware GUI-based SNTP client for the Amiga, which will synchronize system time to a server across the Internet. It is also capable of automatically switching in and out of DST. |
| Java Clock Applet: Supports network synchronization via SNTP, HTTP, Time, and Daytime protocols. Free download. |
| Klox: Windows 9x/NT freeware decorative desktop clock, with different faces and Internet time server syncronization. |
| Network Time Protocol (NTP) Project: Links to many time service clients from the maintainer of the NTP. Includes non-NTP clients. |
| Sync-It with Atom: Network Time Protocol client for Windows with a nice user interface. |
| TymServ: Time reference that draws from multiple time sources. Computer networks and systems can be automatically synchronized. |
| WorldClock: Allows the user to synchronize his or her PC to Internet time servers. Supports both the Time or SNTP protocols. Also provides timezone, alarm and calendar features. |
Classical
