TimeTools GPS Clock Software syncs PC time with a standard NMEA GPS time receiver. It's available as a freeware utility for Windows NT/2000/XP/2003 workstations and servers. The software polls time from the GPS receiver connected to the host PC's serial port.

The GPS clock utility functions by polling GPRMC messages from a standard NMEA GPS time receiver, displaying information such as time, date, GPS status, and satellites. In addition, the GPS clock utility can provide the option of updating the system time of the host PC with GPS time.
It is important to note that time synchronisation can only be achieved to the nearest second. Standard NMEA GPS devices do not offer a pulse per second output that can be utilised by the serial port of a PC. As a result, the microsecond accuracy that is available from TimeTools GPS T1000 and T2000 GPS timing receivers is not available with this software.
Version 1.0.001: 1.0.001 New Release