CAD file created by FreeCAD, a free, cross-platform CAD design application; contains a 2D or 3D design and includes the geometry for the components; uses a feature based parametric modeling system that represents the design using mathematical models; used as the native CAD file format for the software. Objects within a FreeCAD document can be exported to a variety of CAD formats, including .STP, .IGS, .DXF, .VRML, and .STL.