Cross platform (lin/win/mac) geographical information system (GIS)
Open Source Routing Machine - C++ backend
Geographic library
GPS log file viewer and analyzer
Minimalistic wide-open GPS-locator/tracker
Adjustment of local surveying networks, binary builds for Windows
GDAL wheels for python and C/C++ projects (Linux only)
A GUI for the freeware Geographical Information System PCRaster
Plugins for OpenCPN
Geodesy based library (geodetic and geocentric functions)
Geostatistics and geosciences modeling software
Library for OpenStreetMap offline rendering and routing
Multiagent simulator of road traffic in Qt/C++ and OpenStreetMap.
Subway maps of the World !
Open Source Marine Chart Plotting Program
Former project page
OTB is an open-source C++ library for remote sensing images processing
Geographic feature extraction and data mining
QNetMap is the library for displaying the map and the objects on it