1)   IsoMaker 2000 6
IsoMaker 2000 is a technical illustration drawing aid for AutoCAD. It converts 2D AutoCAD entities into isometric entities. Its function is to convert orthographic views into isometric views.

 2)   S3Dfree 2000 6
S3Dfree 2000 is the FREE unregistered version of Solid3D. Solid3D Fastener library is a productivity tool for AutoCAD allows you to create solid models of assorted Nuts, Bolts, Screws and Washers.