nanoCAD is a pro-grade 2D CAD system with native DWG support and full customizability. It is totally free, for business, professional, or personal purposes. It is fast, lightweight, capable, and , unlike most free CAD programs, completely uncrippled. nanoCAD includes:

KOMPAS-3D is for creating three-dimensional associative models for individual parts and assembly's containing both original and standardized elements. The parametric technology allows quickly obtaining models for typical products basing on a once designed prototype.

CMS IntelliCAD® is a full-featured Compatible CAD Software. CMS IntelliCAD also offers a full suite of 2D and 3D AutoCAD® software compatible drawing tools! It is the smartest choice for anyone who creates or communicates using CAD drawings.

GstarCAD is well-known alternative CAD software of high compatibility with ACAD. With 27 years of continuous improvement and innovation, today GstarCAD is far ahead in performance, stability and becomes leading CAD software in the world.

With Creo Parametric, and its extensions, you can create, analyze, view, and share designs downstream using 2D CAD, 3D CAD, and parametric and direct modeling capabilities.

DoubleCAD XT is an free AutoCAD LT work-alike.

DoubleCAD XT is a great companion with AutoCAD - and if you are a Google SketchUp user wanting to go from concept-to-construction drawings - or have an older copy of AutoCAD LT that cant read the latest AutoCAD files - DoubleCAD XT.

MakerSCAD is a web-based parametric 3D design software with a block-based programming language to create objects for 3D printing, animations, games and websites.

B-processor is BIM software that has been and currently is still developed by the Arhus School of Architecture in cooperation with the Alexandra institute.

SpaceClaim Engineer is the world’s fastest and most innovative 3D direct modeler. SpaceClaim Engineer brings 3D solid modeling to the desktops of engineers and analysts who work in 3D, with a simplicity and low TCO (Total Cost of Ownership) never seen before in CAD.

Cobalt is a parametric 3D modeling software for product design and development that's easy to use. It offers wireframe, solid and surface modeling with precision drawings, renderings and animation.

Draft It is a comprehensive computer-aided design (CAD) software that simplifies complex design tasks with its user-friendly interface, catering to both professional designers and enthusiasts. It offers various versions, including a free edition and a professional Architectural...

Graphite is an easy to use precision 2D/3D CAD software for product design and development. Formerly known as Vellum, Graphite offers extremely powerful, precision wire-frame drafting with the elegant ease-of-use that makes it productive even when only used occasionally.