3D Hubs - Airbnb for 3D printing
Notebook.ai - A smart notebook that grows and collaborates with you
Shapeways - Shapeways - 3D Printing Service and Marketplace
Bookblock - Design-led custom notebooks & stationery.
i.materialise - i.materialise is an online 3D printing service, community and marketplace.
Action Method Notebooks - Notebooks for making ideas happen