With a simple search on Google, too many GIS and GPS mapping software could be found, some of them are free and many others are not. Some software has been created to make maps ready for special GPS devices like Garmin or Magellan. For example Mapwel (http://www.mapwel.net/ ) is professional software to create Garmin map. Even there are some software that let you use more than 200 different raster, vector, and elevation data types, the most famous application ever created is Global Mapper ( http://www.bluemarblegeo.com/products/global-mapper.php ) GpsMapEdit in a glance GPSMapEdit is an inexpensive application (most of features are free but some special features like loading Google satellite pictures need registered version) that lets GPS mappers to create professional maps
