Collectie 42 Gcad3D Cam . It has support for importing step files and support for both importing and exporting iges, dxf, and vrml files, … Unfortunately, it is not an open source software and it's not included in the default software repositories of important linux distributions. It has support for importing step files and support for both importing and exporting iges, dxf, and vrml files. Import / export programs, integrated 3d opengl viewer, program interpreter for geometry and nc commands in 3d, integrated nc processor.