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!

 5)   PloView 8.0
PloView displays PDF, HPGL, HPGL-2, HP RTL, Image files at high speed. It can be output to plotter, printer, and can be saved as TIFF, PDF, DXF, JPEG, Bitmap, IGES, EMF file. It can be insert and edit the comment.

 6)   CadFaster QuickStep 2008 R2
CadFaster|QuickStep is a free 3D file viewer with professional-class features. Supports standard file formats such as STEP, IGES, DWG. Users may choose between OpenGL and DirectX drivers. CadFaster|QuickStep is optimized for easy 3D model navigation.

 7)   PloComp 8.0
PloComp displays PDF/ HPGL/Image files at high speed. It can be display maximum of 15 file in pilles. It can be output to plotter, printer, and can be saved as TIFF, PDF, DXF, JPEG, Bitmap, IGES, EMF file. It can be insert and edit the comment.

 8)   PloCon 8.0
PloCon outputs continuously plural files of PDF/HPGL/Image to printer. Output mode is selected from automatic, continuation and step mode. Output from interactive output and other applications. It selects size and direction of paper automatically.