Geographic library
Viking is a free/open source program to manage GPS data
Navigational Algorithms - Marine navigation
An information system for cyclists in Berlin and Brandenburg
Handling and basic analysis of hyperspectral data in R
GDAL wheels for python and C/C++ projects (Linux only)
A C library for parsing/normalizing street addresses around the world
Simple GPS tracking server
Analysis and display of Census, business, government attribute data
Geodesy based library (geodetic and geocentric functions)
A reference implementation of the Polish geobotanical grid
Multiagent simulator of road traffic in Qt/C++ and OpenStreetMap.
A Landsat 8 scene viewer
A map maker via online map services
This is a port of LibRTK on C#, and into a small c/c++ library.
Multiplatform Ham Radio APRS and Mapping Program
Former project page