Let's start one.
Please add all companies of 3D Printing, 3D scanning, software, Additive Manufacturing etc. Promote yours if you want - just do it.
Worldwide too?
I'll start..
Realizer
Prodways
EXONE
MAKERBOT
Matter and Form
Layerwise
Sharebot
Renishaw
Europac
Stratasys
MCOR
EnvisionTec etc.....
Help me make this directory.