QGIS (Quantum GIS) is a cross-platform free and open-source desktop geographic information system (GIS) application that supports viewing, editing, and analysis of geospatial data. Developed by OSGeo, Open Source Geospatial Foundation
License: Open Source
QGIS is a free, open-source GIS platform that offers extensive customization and strong community support, while ArcGIS is a commercial software known for its robust analytical tools and user-friendly interface, but comes with high licensing costs. The choice between the two often depends on budget, specific project needs, and user expertise.