QGIS is a free and open source GIS System. However it comes with an unusual setup. To use it with Pyscripter you need to:
- copy python3.exe and python36.dll (or python37.dll for recent versions) from the bin folder (osgeo4wbin) to the python folder (osgeo4wappsPython36 or osgeo4wappsPython36)
- rename python3.exe to python.exe
Then the installation is similar to the ones described here.