GPS Nuts
- Practical guides, tips, tricks, equipment, software reviews, and other related information provided by recreational GPS users.
- http://www.gpsnuts.com/

Garmin GPS and MapSource Maps
- Side-by-Side comparison pages of Garmin's MapSource line of GPS moving map products.
- http://www.bollar.org/garmin.htm

Sam Wormley's Global Positioning System
- Large collection of information/education resources and links, from Iowa State University.
- http://www.edu-observatory.org/gps/gps.html

GPS World
- Magazine, buyer's guide, solutions database, columns, products and reviews, and employment opportunities.
- http://www.gpsworld.com/

Introduction to GPS Applications
- Introduction to GPS Applications
- http://ares.redsword.com/GPS/

Peter Bennett's FTP directory
- NMEA-0183 and GPS Information
- http://vancouver-webpages.com/peter/index.html