...FlightGear features more than 400 aircraft, a worldwide scenery database, a multi-player environment, detailed sky modelling, a flexible and open aircraft modelling system, varied networking options, multiple display support, a powerful scripting language and an open architecture. Best of all, being open-source, the simulator is owned by the community and everyone is encouraged to contribute.
External Overhead panel and much more for X-Plane A320 JARDESIGN
XOVERHEAD (eXternal Overhead panel) is an add-on for the X-Plane flight simulator. It displays mainly the overhead panel and also some other useful panels. The instruments can be displayed in A320 style. Actually applications support only JARDESIGN A320 X-Plane dataref.
GaugeBook displays Gauges of your FSX (with SP2 or Acceleration) and gives you control over a lot of Settings. Change Frequencies, QNH, etc with a few mouse clicks. It's still beta but the new G1000 is a blast. Runs smooth on any notebook.