FlightGear is a flight-simulator created by an international group of volunteers, and released as free, open-source GPL software. It has been used for academic research, education, and for fun.
FlightGear comes with a set of illustrated documentation, notably “The Manual”, which is available as PDF and HTML. This wiki provides aditional documentation on both user and development topics.
I’m sure that software would be very convient for pilots 😀
Credit to Yan Naing Myint
(Ambassador at Fedora Project)