FreeCAD is a powerful and versatile open-source parametric 3D CAD modeler that is licensed under the LGPL License. While it is primarily designed for mechanical engineering and product design, it also caters to a wide range of engineering disciplines, including architecture, finite element analysis, and 3D printing. With its modular software architecture, FreeCAD can be easily customized and extended to provide additional functionality.

FreeCAD offers a comprehensive set of tools that are similar to well-known CAD software like CATIA, SolidWorks, and Solid Edge. It falls into the category of CAD, PLM, CAx, CAE, and BIM. The software features a feature-based parametric modeling approach, allowing users to easily modify their designs.

FreeCAD utilizes various open-source libraries, such as Open Cascade Technology, Coin3D, Qt, and Python, making it a robust and flexible CAD solution. It is compatible with multiple platforms, including Linux/Unix, Windows, and macOS. Whether you're a mechanical engineer, architect, or 3D printing enthusiast, FreeCAD provides the necessary tools and functionalities to bring your ideas to life