gpsfeed+
is a utility that feeds the PC with continuous GPS data. NMEA 0183 GPS sentences are sent to the application through a socket (TCP/IP) connection or a UDP multicast message. It also outputs the same NMEA data to a serial port of the PC. Polling applications can query the embedded lightweight http server to obtain gps data either in text form or as an XML data snippet.
http://gpsfeed.sourceforge.net