GRASS GIS is described as '(Geographic Resources Analysis Support System) is an open source, free software (FOSS) Geographical Information System (GIS) with raster, topological, vector, image processing, and visualization functionality' and is a GIS software in the travel & location category. There are more than 25 alternatives to GRASS GIS for a variety of platforms, including Windows, Web-based, Linux, Mac and Android apps. The best GRASS GIS alternative is QGIS, which is both free and Open Source. Other great apps like GRASS GIS are Placemark, Plus Codes, ArcGIS and Maptitude.