Best Free CAD Programs

CAD is the use of computer Designing or drafting to aid in the creation, analysis, or optimization of a design. Generally Cad software is used in Creating Design or analyze the design. It is used in Mainly Engineering field like Mechanical , Electrical, Civil and other engineering. CAD may be used to design curves and figures in 2D or 3D space. Mostly Engineer used Autocad to create Cad designing . here are list of some of Best free Cad programs.

1. Sculptris
Sculptris provides an excellent gateway into the exciting world of 3D. It's features are easy to learn, even for someone with no experience in digital art, yet robust enough for creating base models that can then be refined in other applications, such as ZBrush.
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Start with a sphere of virtual clay and shape it into whatever you want it to be. This is made possible in Sculptris by its amazing ability to locally redefine the internal structure of the model.

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2. FreeCAD
FreeCAD is a parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters. FreeCAD is open-source and highly customizable, scriptable and extensible.
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FreeCAD is multiplatfom (Windows, Mac and Linux), and reads and writes many open file formats such as STEP, IGES, STL, SVG, DXF, OBJ, IFC, DAE and many others.

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3. Blender
Blender is free and open source software. Free to use for any purpose, forever. Blender now features a powerful new unbiased rendering engine called Cycles that offers stunning ultra-realistic rendering.
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The built-in Cycles rendering engine offers:
GPU & CPU rendering·
Realtime viewport preview·
HDR lighting support·
Permissive License for linking with external software

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4. OpenSCAD
OpenSCAD is a software for creating solid 3D CAD models. It is free software and available for Linux/UNIX, Windows and Mac OS X. Unlike most free software for creating 3D models (such as Blender) it does not focus on the artistic aspects of 3D modelling but instead on the CAD aspects.
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Thus it might be the application you are looking for when you are planning to create 3D models of machine parts but pretty sure is not what you are looking for when you are more interested in creating computer-animated movies.

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5. DraftSight Free CAD Software
DraftSight allows you to access existing DWG files and create new ones at a fraction of the cost of alternative CAD products. DraftSight has a familiar user interface and a minimal learning curve that facilitates an easy transition from your current CAD application. Learn more about DraftSight’s offerings for every type of user.
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Straightforward 2D CAD software that’s ideal for students, hobbyists and other individuals.

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