Sar Dar 16 Aug, 2018 04:58 PM BlocksCAD - 2D / 3D CADhttps://www.blockscad3d.com/File Support: Import: STL, xml Export: scad, STL, X3D, OBJ, AMF, Polar Cloud, jpg Pros: LEGO style drag and drop CAD modelling Great tool for teaching OpenSCAD to kids View created OpenSCAD code before downloading it Cons:Imported STL files do not export to OpenSCAD files correctlyRuns on:BrowserBlocksCAD example: trefoil_knot_param_eq example