QGIS (formerly known as Quantum GIS) is a free, open-source, and professional-grade Geographic Information System software. Think of it as a superpowered interactive map maker and data analyzer. It allows you to create, edit, visualize, analyze, and publish geospatial information on Windows, Mac, and Linux.
Whether you are tracking wildlife migration, planning a city’s bike lanes, or just mapping out your favorite hiking trails, QGIS is the go-to tool for millions of people worldwide.
Demo coming soon on YouTube on getting started.
Check them out here : https://qgis.org/