gCAD3D is a 3D CAD-CAM application which features an integrated 3D OpenGL viewer, a program interpreter for geometry and NC-commands in 3D, and a programming interface for user programs. It has support for importing Step files and support for both importing and exporting Iges, DXF, and VRML files.
PyCAM generates toolpaths (GCode) for CNC machines out of 3D STL model files or 2D gravure contour files (SVG or DXF). The output of PyCAM can be imported into EMC2 or other machine controllers to direct the milling machine. PyCAM features different path generation strategies, cutter shapes, and post-processing options.