Navigational Algorithms - Marine navigation
Build your own GPS unit
GPS mapping and management software
This is a port of LibRTK on C#, and into a small c/c++ library.
A tile-based map viewer with support for GPX files.
Toolbox for geoscientists and geo enthusiasts
Raster layer editing toolbar for ArcMap 10.x
a free and open map of wireless communicating objects
OsmSharp - OpenStreetMap (OSM) Library and Tools developed in C#