https://openrocket.info - A GUI based interface to build and simulate model rockets and analyse using various graphs - A good tutorial for Open Rocket’s basics - https://www.youtube.com/watch?v=oqe0lTp1WH0&t=2s
Google Earth Pro - A complete visualisation of Earth, Mars, Moon and the Sky from Satellite Images. GIS tool for plotting & understanding using different layers of data
QGIS -