1)   DEVELOPED SECTION for AutoCAD 1.0
An application for AUTOCAD 2002-2009, which determines the developed section of one set of 3DSOLID, 3DMESH or 3DFACE entities and vertical planes passing through a 2D POLYLINE.

 2)   3DINTERSECTION for AutoCAD 3.6
An application for AUTOCAD 2002-2009, which determines the intersection curves between 2 sets consisting of 3DFACE, 3DSOLID or 3DMESH entities.