gCAD3D is a 3D CAD-CAM full fledged application with an built-in 3D OpenGl viewer, a program interpreter for geometry and NC-commands in 3D, an integrated NC-processor and a programming interface for user programs.
It has support for a huge amount of file types and support complex actions like importing step files and support for importing/exporting Iges, VRML and SVG files.
The developer team has just updated gCAD3D to 1.56 version bringing new features like: