PowerCAD:
CAD program in 2D/3D for architectural and mechanical applications,
with AutoCAD compatibility features.
http://www.powercad.com/
Touch-3D:
3D modeling, unfolding and unwrapping program for Macintosh and
Windows, and free-form add-on MCnurbs Creator for VectorWorks and
MiniCad.
http://www.algonet.se/~ludesign/
Joel Orr's World of Technology:
News and articles about CAD, plus books, humor, educational
resources and relevant links.
http://www.joelorr.com/
DesignCAD:
Multipurpose software for 2D drafting and 3D solid modeling.
http://www.DesignCAD.com/
solidThinking:
Modelling software that supports NURBS, polygonal modeling, and
subdivision surfaces, available for Windows and Macintosh.
http://www.solidthinking.com/