From Polar Navy:
PolarCOM is a set of virtual marine instruments and alarms. It accepts NMEA 0183 input from serial port or a network and provides digital and analog instruments for position, speed, course, depth, wind, and other data. It includes standalone anchor and depth alarms with sound and visual warning.
What's new in this version:
Version 1.9 supports for SeaSmart and Actisense NMEA 2000 gateways.