* [PostGIS Vector Tile Utils] (https://github.com/mapbox/postgis-vt-util) - A set of PostgreSQL functions that are useful when creating vector tile sources.
* [Cloudant] (https://cloudant.com/) - IBM noSQL database that supports spatial data (GeoJSON).
* [MondoDB] (https://www.mongodb.com/) - Also supports GeoJSON and spatial indexes.
* [DB2 Spatial Extender] (http://www-03.ibm.com/software/products/en/db2spaext) - Spatial Extender allows you to store, manage, and analyze spatial data in DB2.
* [TerrSet] (https://clarklabs.org/terrset/) - TerrSet (formerly IDRISI) is an integrated geographic information system (GIS) and remote sensing software
* [Guidos Toolbox] (http://forest.jrc.ec.europa.eu/download/software/guidos/) - Some GDAL functionalities and includes MSPA (Morphological Spatial Pattern Analysis) for connectivity maps.
* [gvSIG] (http://www.gvsig.com/en) - Free and open source GIS.
* [GRASS GIS] (https://grass.osgeo.org/) - GRASS (Geographic Resources Analysis Support System) is a free and open source GIS.
* [ILWIS] (http://52north.org/communities/ilwis/ilwis-open) - Integrated Land and Water Information System (ILWIS) is a remote sensing and GIS software.
* [MapWindow GIS] (http://www.mapwindow.org/) - Free and open source desktop geographic information system.
* [Geoserver] (http://geoserver.org/) - WMS written in Java and relies on GeoTools. Allows users to share and edit geospatial data.
* [Mapserver] (http://mapserver.org/) - WMS written in C.
* [Mapnik] (http://mapnik.org/) - C++/Python/Node.js library for rendering.
* [MapGuide] (https://mapguide.osgeo.org/) - Runs on Linux or Windows, supports Apache and IIS web servers, and has APIs (PHP, .NET, Java, and JavaScript) for application development.
* [GAMMA] (http://www.gamma-rs.ch/no_cache/software.html) - Allows processing of SAR, interferometric SAR (InSAR) and differential interferometric SAR (DInSAR).
* [Sentinel Toolboxes] (https://sentinel.esa.int/web/sentinel/toolboxes) - Free open source toolboxes for the scientific exploitation of the Sentinel missions.
* [Landsat-util] (https://github.com/developmentseed/landsat-util) - Landsat-util is a command line utility that makes it easy to search, download, and process Landsat imagery.
* [Rasterio] (https://github.com/mapbox/rasterio) - Rasterio employs GDAL under the hood for file I/O and raster formatting.
* [Rasterstats] (https://github.com/perrygeo/python-rasterstats/) - Python module for summarizing geospatial raster datasets based on vector geometries.
* [Pandas] (http://pandas.pydata.org/) - Open source library providing high-performance, easy-to-use data structures and data analysis tools for the Python.
* [Shapely] (https://pypi.python.org/pypi/Shapely) - Manipulation and analysis of geometric objects in the Cartesian plane.
* [Cartopy] (http://scitools.org.uk/cartopy/) - A library providing cartographic tools for python for plotting spatial data.
* [Pyncf] (https://github.com/karimbahgat/pyncf) - Pure Python NetCDF file reading and writing.
* [chupaESRI] (https://github.com/johnjreiser/chupaESRI) - ChupaESRI is a Python module/command line tool to extract features from ArcGIS Server map services.
* [GeoPandas] (https://github.com/geopandas/geopandas) - Python tools for geographic data.
* [Geotools] (http://www.geotools.org/) - GeoTools is an open source Java library that provides tools for geospatial data.
* [Geonetwork] (http://geonetwork-opensource.org/) - GeoNetwork is a catalog application to manage spatially referenced resources.
* [JTS Topology Suite] (http://www.vividsolutions.com/jts/jtshome.htm) - JTS Topology Suite is an API of 2D spatial predicates and functions.
* [GeOxygene] (https://sourceforge.net/projects/oxygene-project/) - Provide an open framework which implements OGC/ISO specifications for the development and deployment of GIS applications.
* [Gisgraphy] (http://www.gisgraphy.com/) - Open source framework that offers the ability to do geolocalisation and geocoding via Java APIs or REST webservices.