Cross platform (lin/win/mac) geographical information system (GIS)
Open Source Routing Machine - C++ backend
Geographic library
GPS log file viewer and analyzer
Navigational Algorithms - Marine navigation
... the open-source glide computer
A Guide of the Trees of Barcelona City
Geographic feature extraction and data mining
Open OSINT stack for monitoring, analysis, and risk detection
Automated detection of the unknown early map projection
Minimalistic wide-open GPS-locator/tracker
LaMa - A Localization and Mapping library
Adjustment of local surveying networks, binary builds for Windows
A GUI for the freeware Geographical Information System PCRaster
GDAL wheels for python and C/C++ projects (Linux only)
Plugins for OpenCPN
Google Earth Enterprise - Open Source
Interactive visualization of plate tectonics.
Spectral Data - binary builds for Windows 10
Geodesy based library (geodetic and geocentric functions)
A library to generate short codes