Released η version FlightGear 2020.3.10: The FlightGear, is an open source and free flight simulator. It supports many different operating systems and has been developed by experienced volunteers from around the world.
The aim of the game for young and old children is to create a sophisticated and open flight simulator framework for use in research or an academic environment for pilot training or a tool of the aviation industry.
For those who are interested in seeing what the new version brings FlüghtGear (2020.3.10 - released 13/06/2021), they can read it changelog in the official Wiki.
You can download the new open source flight simulator from the following links:
Download FlightGear 2020.3.10