FlightGear

FlightGear is a free, open-source flight simulator developed by an international community of volunteers. It provides realistic flight dynamics, detailed aircraft models, and extensive scenery covering the entire world, making it suitable for both casual flying enthusiasts and serious flight simulation hobbyists. The simulator supports various input devices and offers educational value for learning about aviation principles. FlightGear is cross-platform (Windows, macOS, Linux) and is actively developed with regular updates adding new features and improvements.