Shapeways - Shapeways - 3D Printing Service and Marketplace
Form 2 - The most advanced desktop 3d printer ever created
3D Hubs - Airbnb for 3D printing
Obsidian 3D Printer - The $99 3D printer
i.materialise - i.materialise is an online 3D printing service, community and marketplace.
Glowforge - The 3D laser printer