SolveSpace 3.1 SOLVESPACE is a free (GPLv3) parametric 3d CAD tool. Applications include: modeling 3d parts, modeling 2d parts, 3d-printed parts, preparing CAM data, mechanism design, plane and solid geometry OpenSCAD 2021.01 OpenSCAD is software for creating solid 3D CAD objects. It is free software and available for Linux/UNIX, MS Windows and Mac OS X.