This freebe software seems to be relatively new. It apparently was created to allow users to access and manipulate 3D views of vendor supplied parts. There is a fairly complete suite of 2D tools and some rudimentary, but useful 3D tools as well. Might be worth a look for someone wanting zero cost exposure to 3D modeling. It imports and exports in STL as well as DXF and JPG. Probably won't supplant MOI3D or Blender, but something else to consider. Joe