- AutoCAD
 - Official product information for the CAD software program AutoCAD from Autodesk.  CADdepot
- Shareware, freeware and public domain utilities and files.- De Grands Dessins
- Add-on shareware for AutoCAD that offers an automatic dimension layer setting.
- Archblocks.com
- Offers AutoCAD blocks/symbols to the architectural industry. Libraries include furniture, people, autos, plants, lighting, plumbing fixtures, doors and windows, etc. Also offers drawing titleblocks.
- Autodesk
- Autodesk is a developer of AutoCAD and other design and drafting software and multimedia tools, primarily for the business and professional environment.
- Autograph Technical Services
- Offering CadCARD Slidechart reference tool for AutoCAD.
- Bolder Designs
- Specializes in networks for CAD users.
- Caddtech
- D.C. CADD
- DotSoft
- Offers productivity tools for the AutoCAD professional.
- Eclipse Software
- Makers of Facade, a 3D modelling software. Samples of Autocad DWG files and VRML models.
- EMT Software, Inc.
- Offers mechanical design applications for AutoCAD R13, R14, and 2000. Also offers SolidMech, a mechanical design add-on for SolidWorks.
- Robison Engineering, Inc.
- Featuring Design Master, an engineering tool for AutoCAD 2000 that automates the process of creating HVAC and electrical plans for the architectural building industry.
- Schaefer Enterprises and Associates (SEA)
- Produces Super Menu enhancement for AutoCAD and sales support software.
- SimpleCAD
- AutoLISP program to manage AutoCAD blocks and AutoLISP routines.
- Trace Software Group
- CAD Software development company specialising in mechanical and electrical sectors. Products include parametric design system, ParaBase, and 2D and 3D mechanical parts libraries.
- Tri-Service CADD/GIS Technology Center
- Tri-Service CADD/GIS Technology Centre at the Waterways Experiment Station (WES) in Vicksburg, Mississippi fosters and promulgates CADD/GIS technology to empower life-cycle facilities management of DoD property.
- VDS-Studio
- 3d-meshes and links to other 3d-sites.
- Zak Morris Company
- Products for Autodesk's AutoCAD and Windows applications. Includes Z-Keys, VisualTablet, PCJobber Dimensional Calculator, Soft Engine display list driver and ergonomic Contour Mouse.
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