Autodesk's official AutoCAD website.
The creators of the most used CAD software.

CAD drafting software:- AllyCAD
AllyCAD is a professional user-friendly 2D CAD package that has established itself as the best of its breed. Both professionals and novices prefer AllyCAD for its speed, strength, essential functionality and renowned ease-of-use. We have designed the software to work the way you do, intuitively and naturally.

Cadopolis.com
We provide the best AutoCAD Software, Add-ons, Utilities, Forums, Links, and CAD Shareware.

Concrete and Steel Structural Software S
Structural Concrete and Steel CAD and Analysis in Autocad. Adaptive parametric technology automates the 2D-3D model creation process, automatically generates construction drawings with bi-directional link to complete analysis and calculation.

Design Collaboration Website
pdmOffice offers an affordable Design Collaboration framework that offers several compelling benefits to a product design professional and organizations by reducing the typical overhead associated with design and design-related activities.Mechanical Design Automation - supports all leading market CAD solutions Electronic Design Automation - Cadence, Synopsis, Mentor Effective Project Management Solution with one-click status entry and scheduling update Native peer-to-peer information sharing Document versioning and control Absolute control over your intellectual property Attribute-based search capability across product, project, and documents