Open Source Hardware is changing the world as we know it!
Sharing ideas and knowledge accelerate the innovations and the access to low cost 3D printing allow casual people to build stuff which they could only dream on about several years ago.
What http://robohand.net/ does is one example, this is low cost Prosthetic hand project which anyone with 3D printer can replicate or learn and modify at home.
This video show how cool is this
There are commercial solutions which pass all tests and certifications but cost $20-30 000, then what happen in the poor and less developed countries where this amount is fortune? With $1000-2000 3D printer you can print one Prosthetic hand which may be not so solid and fancy as the commercial solution but will work! and it will cost just $10 to make it!