Free AutoLISP routine that measures and displays distances in various units.
http://mywebpages.comcast.net/medeziner/
Optimizes complex 3D models, which originate from CAD/CAM/CAE systems and other sources, for use on the Internet. [Win95/98/Me/NT/2000]
http://www.parallelgraphics.com/products/imo
Batch purging utility which allows you to manage large AutoCAD (12-14, 2000 and LT versions) drawing archives.
http://www.absolutecompsolutions.com/purgem2000.htm
Producer of formal verification systems. Contains product description and support information, company overview, news, and contact information.
http://www.verplex.com/
Offers free downloads of general-purpose CAD command extensions, as well as custom development.
http://www.apmatics.com/
A second portal by Autodesk that helps designers to locate industry resources, with additional services for subscribers.
http://pointA.autodesk.com/
An educational project trying to develop a gesture-based interface for 3D modeling. It uses wxWindows, ACIS, OpenGL and DevIL.
http://virtual.inesc.pt/~tfdc
COPRA MetalBender for AutoCAD and Mechanical Desktop for parametric and non paremetric sheet metal design and unfolding.
http://www.datam.de/English/