X-Plane is a flight simulator produced by Laminar Research. A desktop version is available for macOS, Windows, and Linux, while a mobile version is available for Android, iOS, and webOS. X-Plane is packaged with several commercial, military, and other aircraft, as well as basic global scenery which covers most of the Earth. X-Plane also ships with other software to build and customize aircraft and scenery. X-Plane also has a plugin architecture that allows users to create their own modules, extending the functionality of the software by letting users create their own worlds or replicas of places on Earth. This is further enhanced by the Scenery Gateway which allows user to share airports with other users and eventually the airports are included by default in the base product.
On November 25, 2016 Laminar Research released the first public beta of X-Plane 11 to the general public. A second public beta was released on December 6, 2016 which fixed some major bugs. The official full release of X-Plane 11 was released on March 30, 2017.
Source: Wikipedia, "[en.wikipedia.org/wiki/X-Plane_%28simulator%29 X-Plane (simulator)]", available under the CC-BY-SA License.