- R
- Free software environment for statistical computing and graphics
- https://www.r-project.org
- QGIS
- User friendly Open Source Geographic Information System (GIS) licensed under the GNU
- https://www.qgis.org
- GRASS
- Free Geographic Information System (GIS) software used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization
- https://grass.osgeo.org
- Inkscape
- SVG-based graphics editor featuring alpha blending, node editing, SVG to PNG export, and more
- https://inkscape.org