Key Players (this may not be a complete list and extra companies can be added upon request):
3D Systems Corporation
Artec 3D
AUTODESK Inc.
Dassault Systmes
Digital Mechanics AB
Doob Group AG
GPI Prototype & Manufacturing Services Inc.
Imaginarium
Materialise NV
Organovo Holdings Inc.
Pixologic Inc.
Prodways
Proto Labs Inc.
PTC Inc.
Sciaky Inc.
Sculpteo
Shapeways
Siemens PLM Software Inc.
Star Rapid
STRATASYS LTD.
The ExOne Company
Trimble Inc.
VoxelJet AG