ARES Commander!

AutoCAD is a software application for both 2D and 3D computer-aided design (CAD) and drafting — available since 1982 as a desktop application and since 2010 as a mobile web- and cloud-based app, currently marketed as Autocad 360.

LibreCAD (originally QCad then CADuntu) is an open source 2D CAD application for Windows, Apple and Linux. It is based on Qt, which is a leading cross-platform application and UI development framework.

DraftSight is a professional-grade, open 2D CAD product for users who want a better way to read, write and share DWG files. DraftSight is easy to use and is available for professional CAD users, students and educators to download and activate for free.*

BRL-CAD is a powerful cross-platform open source solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, image and signal-processing tools, a system performance analysis benchmark suite, libraries for robust geometric representation, with more than 20 years of active development.

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:1. Classic CAD interface. Any engineer could easily master nanoCAD since everything is in their right places: menu, button icons, panels, command line, and the commands theirselves are easily recognizable. This makes nanoCAD easy to migrate to since enterprise needs no time to retrain its engineers.2. Native *.dwg support. The world’s most popular file format for technical documentation - *.dwg – is the nanoCAD native file format. Project created using nanoCAD and saved as *.dwg file could be easily opened and edited in any CAD application supporting *.dwg which in turn makes nanoCAD perfect tool for project collaboration and sharing.3. Ultimate design tool. nanoCAD includes all necessary tools required for basic design and allows creating and editing 2D and 3D vector primitives, texts, tables, blocks, graphical technical documentation display and print settings using either a model or a sheet. »

A powerful CAD platform, with features familiar to you from native .dwg applications. BricsCAD® unifies advanced 2D design with the intelligence of 3D direct modeling. For Windows, Linux, and Mac.

QCAD is an application for computer aided drafting in 2D. With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schemas and diagrams. QCad uses the AutoCAD DXF file format internally and to save and import files. AutoCAD DWG support is available as a commercial plugin.

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. Numerous service functions facilitate solving auxiliary designing and production maintenance problems.

DesignFreeQ is an easy to use wireframe modeler for CAD. Need a dongle.

progeCAD Smart 2009 is a limited version of progeCAD . It is free for private, non-commercial use only. You need to register the software to continue using it after 30 days. Of course registration is totally free.

Draft It V4 is a powerful, easy to use 2D CAD Software package that is completely free to use. No restrictions means you're free to create, save and print your work with our unlimited free version. During the initial 15 days after installation you can trial three other versions.

Free download software to design 3d models for 3d printing and fabrication for Windows, Mac OS X, iphone, ipad

MEDUSA4: The comprehensive 2D/3D design automation suite for mechanical, plant, construction and automotive engineering