Autodesk, Inc.:The creators of AutoCAD. Includes the searchable support database, a download area and discussion groups.
Adee's AutoCAD Answers: Answers to Frequently asked AutoCAD Questions.
Autocad Central: A series of basic AutoCAD tutorials, and a discussion forum for questions and answers.
AutoCADder blog: News and comments about AutoCAD, LT, Inventor and other Autodesk software, product releases, and technology.
Autocadzone: Free AutoCAD help and tips, tutorials and video tutorials, and student examples of 3D models.
Autodesk Blogs: A series of Blogs from Autodesk employees about various topics related to the company and its products.
Autodesk Point A: A second portal by Autodesk that helps designers to locate industry resources, with additional services for subscribers.
CAD Forum: Database of tips and tricks for AutoCAD, AutoCAD LT, 3D Studio, Inventor and other products by Autodesk and HP.
CAD Panel: A source for AutoCAD users to download free AutoLISP routines, hatch patterns, material libraries, tips and techniques, extra help, and articles.
Cadalyst: Bugwatch: A monthly column documenting old and new bugs in AutoCAD and their workarounds or fixes, where available.
Cadopolis.com: Commercial portal for products and services related to AutoCAD, with add-ons, software downloads, forums and links.
Cadville: Free portal for AutoCAD and Autodesk product users, with news, product reviews, an events calendar, and links to other resources.
The Autodesk File: A history of Autodesk and AutoCAD by John Walker, the founder of Autodesk.
The CAD Depot: A repository of freeware and shareware tools for use with AutoCAD and other CAD systems.