If you still use FSX or Prepar3D, look for officially supported and purchased aircraft. Some developers still create content for these platforms, and you can find freeware that is legally distributed.
feelThere CALL! for 737 Pilot in Command is a commercial flight simulator add-on designed for Microsoft Flight Simulator X (FSX) and FS2004. It is specifically built to enhance the Wilco/feelThere 737 Pilot in Command If you still use FSX or Prepar3D, look