FreeCAD 3D Parametric Modeling CAD design Software Windows & 3d printer
For windows XP/7/8/10 Great for all user and 3d printer designs. FreeCAD is multiplatfom (Windows, Mac and Linux), and reads and writes many open file formats such as STEP, IGES, STL, SVG, DXF, OBJ, IFC, DAE and many others.