Also very exciting is Lockheed Martin’s Prepar3d, which is Microsofts ESP (Pro version of FSX) developed further for Lockheed’s flight test and training needs.  Of course all FSX addon’s will work in P3D (mostly) so it’s an easy port over to this newly developed platform.  Of course it still suffers the old code of FSX but many functions are being tweaked and fixed by Lockheed’s programmers, some of whom came over from ACES (Microsoft’s gaming studio that developed all the FS series) to further develop P3D.