1)   3D Shop ModelView 1.0
ModelView is an exact 3D model geometry viewer that allows the manipulation of CAD data. This open viewer provides wide access to 3D models in the most popular file formats (dxf, Step, VRML, IGES, CATIA, UG, Pro/E, ACIS, PARASOLID) and data standards (brep, stl, wrl, stp)

 2)   CtrlView 3.20
CtrlView is a fast, compact, powerful viewer/converter for different 2D/3D raster/vector file formats with the format recognition system. It means that CtrlView analyses content of the file and defines its format.

 3)   IGES Import for AutoCAD 1.0
IGES Import for AutoCAD is a plug-in for AutoCAD 2000, 2000i, 2002 and 2004. This plug-in gives AutoCAD the ability to import geometric data from ASCII IGES files.

 4)   Solid Converter DWG to PDF 2.0
Now your AutoCAD drawings are more usable than ever. Solid Converter DWG converts DWG and DXF files to vector PDFs. In Version 2 you can convert only selected layouts or layers and control output colors. And you don’t need to have AutoCAD® to use it!