Prototypes are pushing the field of global development technology forward as they evolve in workshops, universities, laboratories and even garages. We asked our international network of experts in engineering for global development to recommend the innovations that they believe we should keep an eye on. This is a look at some of the newest hardware, software and services in development now. Each is designed to meet a basic need in the world’s underserved communities. And each has the potential to become a marketable product that can improve the quality of life. These are promising prototypes to watch in the year ahead.