FreeCAD

FreeCAD 0.10
Original author(s)	Juergen Riegel, Werner Mayer
Stable release	0.11 / April 18, 2011; 7 months ago
Written in	C++, Python
Operating system	32-bit MS Windows (NT/2000/XP), All POSIX (Linux/BSD/UNIX-like OSes)
Type	3D Modeling, Scientific Engineering
License	GPL or LGPL
Website	free-cad.sourceforge.net

FreeCAD is a general purpose 3D CAD modeler. It is free software (GPL & LGPL License). FreeCAD is aimed directly at mechanical engineering and product design but also fits in a wider range of uses around engineering, such as architecture or other engineering specialties.

Bearing's 3D model running on FreeCAD 0.10.

FreeCAD features tools similar to CATIA, SolidWorks or Solid Edge, and therefore also falls into the category of MCAD, PLM, CAx and CAE. It is intended to be a feature-based parametric modeler with a modular software architecture, which makes it easy to provide additional functionality without modifying the core system.

As with many modern 3D CAD modelers it will have a 2D component in order to extract design detail from the 3D model to create 2D production drawings, but direct 2D drawing (like AutoCAD LT) is not the focus, neither are animation (like Blender) or organic shapes (like Maya, 3ds Max or Cinema 4D), although, thanks to its wide adaptability, FreeCAD might become useful in a much broader area than its current focus.

FreeCAD is intended to make use of other open-source libraries from the field of Scientific Computing. Among them are Open CASCADE (a powerful CAD kernel), Coin3D (an incarnation of Open Inventor), the Qt GUI Framework, and Python, a popular scripting language. FreeCAD itself can also be used as a library by other programs.