| CAD Panel - http://www.cadpanel.com/ A source for AutoCAD users to download free AutoLISP routines, hatch patterns, material libraries, tips and techniques, extra help, and articles. |
| Cadopolis.com - http://www.cadopolis.com/ Commercial portal for products and services related to AutoCAD, with add-ons, software downloads, forums and links. |
| Cadville - http://www.cadville.com/ Free portal for AutoCAD and Autodesk product users, with news, product reviews, an events calendar, and links to other resources. |
| Design Aids - http://www.designaids.com/ Serves resources of engineering, architecture and construction design aids and design tools. Features books, magazines and free software. |
| Evolution Computing, Inc - http://www.fastcad.com/ Developers of the FastCAD and EasyCAD computer aided drafting programs. |