FreeCAD
FreeCAD is a free and open-source parametric 3D computer-aided design (CAD) modeler and building information modeling (BIM) software. It is primarily used for designing real-life objects of any size, from small components to architectural structures, and supports a modular architecture that allows users to extend functionality with plugins. The software is cross-platform and written in Python and C++, making it accessible for customization and automation.
Developers should learn FreeCAD when working on projects involving 3D modeling, mechanical engineering, product design, or architectural planning, as it provides a cost-effective alternative to proprietary CAD software like AutoCAD or SolidWorks. It is particularly useful for open-source hardware projects, 3D printing, and simulations, where parametric design allows for easy modifications and automation through scripting. Its Python API enables integration with other tools and workflows, making it valuable for developers in robotics, manufacturing, or research fields.