Extremely powerful, completely free 3D CAD modeling
FreeCAD, the open source 3D parametric modeler
FreeCAD allows users to sketch constrained 2D geometry and extract design details from 3D models to create high-quality production-ready drawings. The integrated constraint-based 2D sketcher serves as the foundation for building 3D objects, and users can generate 2D views and documentation from 3D models.
FreeCAD is highly customizable and extensible with Python scripting throughout the application. Users can code custom tools, full workbenches, and macros. The software reads and writes many open file formats, supports add-on workbenches via the Addon manager, and allows seamless integration into existing workflows without vendor lock-in.
FreeCAD includes Finite Element Analysis (FEA) tools, experimental CFD, CAM/CNC workbenches, and supports export to dozens of file formats (STEP, IGES, STL, DXF, OBJ, IFC, etc.) for 3D printing and CNC machining. Users can extract quantities and bills of materials from models.
FreeCAD provides a powerful parametric 3D modeler with real-world units, solid geometry kernel based on Open CASCADE Technology, and parametric constraints that allow users to modify designs by changing parameters in model history. Supports complex Boolean operations, fillets, and shape cleaning for production-ready designs.
FreeCAD 1.0+ includes a built-in BIM workbench (merged from previous Arch and external BIM workbenches) that provides dedicated tools for building and construction-related projects out of the box, enabling architects to work with building information modeling.