3D Print Stuff (20181130)

https://www.autodesk.com/products/fusion-360/overview

And a "Slicer"

Also, see: OpenSCAD and Meshmixer

https://www.openscad.org

http://www.meshmixer.com

Protolabs
https://www.protolabs.com

Xometry (on-demand manufacturer)
https://www.xometry.com

3D Hubs (on-demand manufacturer)
https://www.3dhubs.com

3MF Consortium
https://3mf.io