Shapeways - Shapeways - 3D Printing Service and Marketplace
Obsidian 3D Printer - The $99 3D printer
3D Hubs - Airbnb for 3D printing
Form 2 - The most advanced desktop 3d printer ever created
i.materialise - i.materialise is an online 3D printing service, community and marketplace.
ZMorph - A multi-fab 3D printer that enables fast product prototyping