W3D Systems
W3DLT
WAIO Robotics
WAirwolf 3D
WAleph Objects
WAstroPrint
WEnvisionTEC
WFormlabs
WGeeetech
WKudo3d
WLimbitless Solutions
WM3D (company)
WMakerBot
WMaterialise NV
WObjet Geometries
WPrusa i3
WSindoh
WSolidoodle
WStratasys
WVelleman
WY Soft