The charity started only a couple ofyears ago and in such a short time has made a massive difference to the lives of kids with hand disabilities. They help connect kids with people who have 3D printers who are happy to help donate their time and resources by printing custom 3D printed prosthetic hands. They even connect people across the globe and have lots of useful resources for the various technical know-how how required for such a complex device.
I particularly admire their handomatic, a web app that allows users to enter their measurements, select different models of hand required and then generate the 3D files required for printing. Amazing stuff.