OpenSCAD
Open SourceOpenSCAD is a powerful, free software for creating solid 3D CAD objects using a descriptive programming language. It's not an interactive modeller but focuses on constructive solid geometry (CSG) and extrusion of 2D outlines.
Discover Mac OS X Softwares to Extrusion.
Create 3D solids by extruding 2D profiles along a path or revolving them around an axis.
OpenSCAD is a powerful, free software for creating solid 3D CAD objects using a descriptive programming language. It's not an interactive modeller but focuses on constructive solid geometry (CSG) and extrusion of 2D outlines.