QGIS is a professional GIS application that is built on top of and proud to be Free and Open Source Software (FOSS). Gary Sherman released QGIS (originally known as Quantum GIS) in early 2009 and it has since been maintained by an active volunteer group since.
Below is a list of QGIS asynchronous resources.
For Intermediate/Advanced GIS Users
Want to use QGIS but need help installing? Follow the guide below.