To win the American Society of Mechanical Engineers (ASME) Innovation Showcase–a social purpose technology contest–it takes more than a good idea. And it takes more than a mobile app of questionable real-world usefulness. The three winning teams, which you will learn more about below, developed their hardware projects over several years and many iterations. They’re all now approaching feasibility, with reasonable business models, having taken account of local conditions, and even manufacturing and legal questions. Frothy apps these are not.