FreeCAD 0.20 has been released. FreeCAD is a general parametric 3D CAD modeler, equipped with FEA tools, experimental CFD, CAM/CNC workbench, robot simulation module, etc., which is released based on LGPL license. Like most CAD modelers, it has many 2D components for drawing flat shapes or creating production drawings. In addition, FreeCAD uses a lot of scientific computing open source libraries, including the powerful CAD core Open Cascade Technology (OCCT), the 3D graphics development kit Coin3D compatible with Open Inventor, the well-known UI framework Qt, and the foot