FreeCAD

FreeCAD is an accessible 3D CAD modeler built on a parametric foundation, ideal for users at any stage of their design journey. This lightweight and portable application lets you create precise 3D models by defining parameters and relationships, which you can revise at any point in the design process. It is packed with handy tools and extensive configuration options to tailor the experience to your specific project needs, from simple parts to intricate assemblies. The software supports a wide range of file formats, facilitating easy collaboration. FreeCAD's open-source model ensures continuous community-driven improvement, making advanced 3D modeling free for everyone.