List the top five flight simulators. Try to include at least one paid and unpaid simulator.
Here are the top five flight simulators:

    Microsoft Flight Simulator (Paid) - A highly realistic and popular flight simulator, offering a vast and detailed virtual world to explore.

    X-Plane 11 (Paid) - Another highly realistic and advanced flight simulator, known for its accurate flight models and diverse range of aircraft.

    Prepar3D (Paid) - A professional-level flight simulator used by many organizations for training and simulation purposes.

    FlightGear (Free and open source) - A free and open-source flight simulator with a large and active community of developers and users.

    Aerofly FS 2 (Paid) - A high-quality flight simulator with a focus on providing a realistic and immersive flight experience, with a range of aircraft and detailed environments.

Note: These are some of the most popular flight simulators, but there are many others available, both paid and free, with varying levels of realism and features.
What are some of the main differences in Features between these simulators?
Will I need a powerfull computer to run them?