The creators of AutoCAD. Includes the searchable support database, a download area and discussion groups.

PTC is a maker of MCAD solutions including Pro/Engineer, Pro/Mechanica, ICEM Surf, CADDS5, and Pro/Desktop.

A solid modeling program for mechanical engineers and designers, as well as add-on applications.

@Last Software designed this sketch-based 3D design program that is easy to use.

Provides software tools and consulting services for electronic design.

Provides tools and services for digital system-on-chip design.

A 2-D and 3-D CAD-CAM system for programming CNC machines including milling, lathe, wire EDM and CNC routers. Supports IGES and DXF input and RS-232 communication.

Developers of engineering, design, and CAD software for the geoengineering/GIS, civil, mechanical, plant, and building industries, including MicroStation.

Supplier of EDA and embedded software design tools for the Microsoft Windows environment. Formerly Protel International.

Develops the AutoVue family of programs to view and markup 2D/3D CAD and office formats. A thin/thick-client CAD viewer integrates with ERP, PLM, and document management systems.

Database of tips and tricks for AutoCAD, AutoCAD LT, 3D Studio, Inventor and other products by Autodesk and HP.

OPENCORES.ORG hosts a repository of free, open source IP cores (chip designs, System-on-a-Chip) and supplemental boards.

A second portal by Autodesk that helps designers to locate industry resources, with additional services for subscribers.

Developers and distributors of numerical control programming products.

CAD sites organized into top ten lists, covering all major CAD software packages, plus industries, CAD jobs, tutorials, and tips and tricks.

Collects links to CAD/CAM/CAE related articles published online.

The user organization officially sanctioned by Autodesk for its products. Further information requires registration.

Software for construction and design management, with CAD tools for wood and steel frameworks and premanufactured housing.

Developers of the Chief Architect 3D architectural design software, offering technical support, training resources, and discussion forums.

Delcam provides cad/cam solutions for 3D machining, toolmaking, 3D designing, modeling, mold making, inspection, reverse engineering.