Can't do much better than this one. Two guys who didn't know each other except over the Internet, one in Bellingham, WA, one in South Africa, start collaborating and succeed in building a replacement hand for those who have lost theirs, using open source OpenSCAD software, and manufactured entirely by a Makerbot 3D printer.
That's impressive enough. But what they did then is to put the design into the public domain and put the plans for how to build one yourself up on a forum where Makerbot "blueprints" are shared so that those who needed new hands but couldn't afford them (they cost tens of thousands of dollars) could make their own. http://arstechnica.com/information-technology/2013/02/robohand-how-cheap-3d-printers-built-a-replacement-hand-for-a-five-year-old-boy/ That's the way a real mensch would do things.
