Geeks Without Bounds supports humanitarian open source technology. We organize hackathons through the international Random Hacks of Kindness (RHoK) program. We run an accelerator program that helps promising hackathon prototypes turn into sustainable projects and organizations. We organize educational events that bring subject matter experts on a range of humanitarian issues together with technologists at all levels -- from K-12 through professional -- for skill development while working on important real world challenges. Then, we take all of that and bring it together in the field with volunteer teams that deploy technology while training local community members who can fully "own" the open solutions to the challenges they face.