"The FlightGear Flight Simulator project is a free, open-source, multi-platform, cooperative flight sim development project. Source code for the entire project is available and licensed under the GNU General Public License. The FlightGear project is working to create a sophisticated flight simulator framework for the development and pursuit of interesting flight simulator ideas. We are developing a solid, basic sim that can be expanded and improved upon by anyone interested in contributing."
precision_manufacturingFlightGear airline_seat_recline_extraCivil