Touch the Sky Simulations has released the Boeing Stearman for FS2004. Developed with new techniques in modeling and compiling, for more polygons and better performance. Downloadable as freeware at AVSIM.
The Just Flight SportCruiser for FSX has been released on the Just Flight Website.
This ultralight two-seater comes in ten variants with three different panel options - the Dynon glass panel featuring a Dynon EFIS-D100, Dynon EMS-D120 and AP74 autopilot, an analogue 6 pack panel featuring the standard six primary instruments as well as a Garmin GPS unit and a Garmin CDI-106, and a Basic VFR panel with an airspeed indicator, altimeter and turn co-ordinator.
The animations include the BRS (Ballistic Recovery System) - if you ever get into real trouble in the air, you can trigger a rocket in the fuselage which will deploy a parachute to get you safely back to terra firma! A full PDF manual complete with flight tutorial is included.
ND Art and Technology released the Yakovlev Yak 55M for X-Plane, more details here.
Highly detailed 3D model
Accurate virtual cockpit
Use of normal maps (see the awesome rivets) and high-res textures
Completely animated
Very high frame rates