From AlphaOmega Software:
You want to convert Direct3D X files (Windows) into 3DMF files (Macintosh)? Then X To 3DMF Converter is what you need. X To 3DMF Converter allows you to convert Direct3D X files into 3DMF files. It converts files from the Direct3D X format into the 3DMF format. It can be used to convert 3D models from FMS or Metasequoia to RC Helicopter Simulator. It converts only the 3D model of the X file but not its textures. It displays the vertices and the faces of the converted object in its window. It doesn't need any installation which makes it very easy to use. It is available in Dutch, English, French, German, Italian and many other languages.