We have seen 3D printed prosthetic hands almost make it into the mainstream over the last year, mainly due to an organization called E-nabling the Future. One college student who is missing his left hand has decided to create his own company to help those seeking a custom prosthetics, and giving the ability to them to purchase one for just $300. The company which is called GRASP will even have a mobile application, allowing people to take photos of their arms and then have a hand printed by sending those images to the company. More details on Jordan Nickerson, the founder, and the company can be found here: http://3dprint.com/12266/grasp-3d-printed-prosthetic

Below is a picture of Nickerson and his 3d printed hand: