Changes

http://slic3r.org/images/logo.png '''Slic3r''' G-code generator for 3D printers (free and open source) [http://slic3r.org/ slic3r.org] (free and open source)

https://www.rhino3d.com/en/images/v5logo-m4.png '''Rhinoceros 3D''' The world's most versatile 3-D modeler (free for 90 days) [https://www.rhino3d.com/download rhino3d.com] (free for 90 days)