DXF2papercraft converts a polygonal 3D model stored as DXF file into a plain drawing in the form of a 2D DXF file. This requires to 'unfold' the model. The result is a flattened pattern of connected polygons. All edges of a polygon which are unconnected get a so called glue-tab in addition. The tabs are numbered such that each one has a counterpart with the same number. After all pairs of tabs have been glued together the paper model corresponds to the 3D object.
The program seems to be no longer updated. Last version, 0.2, released in February 2012, can be still downloaded from SourceForge.