Best Open Source Cad Software

  • Wed, 11/04/2015 - 15:46 by aatif

Best Open Source Cad Software

CAD is stand for Computer Aided Design. CAD system consist of the combination of hardware and software. For utilizing CAD system needed quality graphics monitor, mouse, light pen and printer. It is mostly used by engineers, drafters, architectures, artists to create accurate technical illustration and drawings. By using CAD software we can design anything like furniture, toys, automobile, airplanes, house, circuit boards etc. It allow you to create two dimensional(2D) and three dimensional (3D) graphical representations of physical objects.

CAD software provide best practices, lower development costs, increase productivity and product's quality. It provide good visualization of products and allow you to see it before final the product. CAD software enhanced documentation of the design by using geometries and dimensions and allow facility of bills of materials. Lot of CAD softwares are available in market but my focus in this article is to discuss few of the open source CAD software. Lets see some of the comprehensive open source CAD softwares.


FreeCAD is an open source parametric 3D modeler for CAD, MCAD, CAx, CAE and PLM. It is mostly used in mechanical engineering. It is comprehensive software tool, highly customizable extensible and scriptable. By using FreeCAD you can easily customize your design and change parameter in model history. It is written in C++ and Python language and supported cross platform (Windows, Mac and Linux). It released under LGPLv2+ license.


It supported both 2D and 3D modeler component.
It can exchanged by the following formats DXF, SVG, STEP, IGES, STL, OBJ, DAE, SCAD, IV and IFC.
It is complete graphical user interface based application.
It can be run through command line.
It can be imported as a Python module.
It provides parametric associative document objects.
It has built in scripting framework and built in Python console.
It provide full macro recording & editing.


Blender is a free and open source CAD software solution. It is mostly used for creation of animated films, 3D models & interactive applications, visual effects, artistic applications, rigging, animation, simulation, motion tracking rendering, video editing and games creation. It supported cross platform (Linux, Windows and Macintosh) and released under GNU General Public License (GPL).


It provides support for wide range of geometric primitives like polygon meshes, fast subdivision surface modeling etc
It provide integration support.
It has plugin support.
It used Python scripting for tool creation and prototyping, game logic and importing.
Provide Node Support for full customization.
It offers range of rigging tools weight painting,mirror functionality, interpolated bones.
It provide 20 different brush support of sculpting.


BRL-CAD is an open source CAD software solution. It based on constructive solid geometry (csg) modeling. BRL-CAD consist of interactive geometry editor, path tracing & ray tracing support, geometric analysis, rendering analysis, frame buffer support, performance analysis benchmark, embeded scripting, geometric representation and analysis library. It is written in C, C++, Tcl and released under BSD, LGPL. It also supported cross platform.


It provide real time ray tracing and collision detection.
It has extendable modeling tools.
It has an interactive 3D world editor.
It provide APIs for the creation of geometry via code.
It provide CSG and mesh objects in geometric.
Easy to use network transport library.