1. GdalGDAL is an open source X/MIT licensed translator library for raster and vector geospatial data formats.
2. OsgeoThe Open Source Geospatial Foundation is not-for-profit organization to empower everyone with open source geospatial. Directly supports projects as an outreach and advocacy organization providing financial, organizational and legal support. Works with our sponsors and partners for open software, standards, data, research and education.
3. ProjPROJ - Cartographic Projections and Coordinate Transformations Library
5. Zoo ProjectZOO is a WPS (Web Processing Service) open source project released under a MIT/X-11 style license . It provides an OGC WPS compliant developer-friendly framework to create and chain WPS Web services. This repo is a mirror of the project SVN.
6. Homebrew Osgeo4macMac homebrew tap for maintaining a stable work environment for the OSGeo.org geospatial toolset
7. GrassGRASS GIS - free and open source Geographic Information System (GIS)
8. grass-addonsGRASS GIS Addons Repository (Manuals: https://grass.osgeo.org/grass-stable/manuals/addons/ | Linux-logs: https://grass.osgeo.org/addons/grass8/logs/ | Windows logs: https://wingrass.fsv.cvut.cz/grass82/addons/grass-8.2.0/logs/)