1)   MarshallSoft GPS Component for Visual Basic 1.4
GPS component VB library toolkit reads and decodes standard GPS NMEA 183 sentences from the RS232 serial port, as well as computes great circle distances and bearings. Runs as a background thread unattended. Works with Visual Basic and VB.NET.
gps component, nmea, rs232, usb, bluetooth, navigation sentence, nmea sentence, gps sentence, component, library,

 2)   MarshallSoft GPS Component for C/C++ 2.0
GPS component C/C++ (.NET) library toolkit reads and decodes standard GPS NMEA 183 sentences from the RS232 serial port; computes great circle distances and bearings. Runs as a background thread unattended. Works with C++,VC.NET,C#,MFC,C++ Builder.
gps component, nmea, rs232, usb, bluetooth, navigation sentence, nmea sentence, gps sentence, component, library,

 3)   HS NMEA GPS C Source Library 1.0 1.0
HS GPS is a software library (with full C source code) which provides access to a NMEA-183 compliant GPS receiver via a serial communications port, decoding NMEA sentences: $GPGGA, $GPGSA, $GPGSV, $GPGLL, $GPRMC and $GPVTG.
NMEA-183, GPS, GPS Source Code Module, Global Positionning System, NMEA decoder, GPS decoder, NMEA sentence, $GPGGA, $GPGSA, $GPGSV,

 4)   HS GPSDLL Library 1.1
HsGpsDll is a Windows Dynamic Link Library which provides access to any NMEA-183 compliant GPS receiver via a serial communications port. HsGpsDll is designed for use from Visual C, Visual Basic or other programming languages.
NMEA-183, GPS, GPS Source Code Module, Global Positionning System, NMEA decoder, GPS decoder, NMEA sentence, $GPGGA, $GPGSA, $GPGSV,