Effective Disaster Risk Management (DRM) programs can make a significant difference in how communities prepare and respond to disasters. Countries that are most vulnerable to natural hazards, but where fewer investments in DRM programs are made, often suffer from the inability to collect, share and effectively use available risk information. Contributing factors to the problem are the costs of procuring, managing and sharing data, the expertise and training required to analyze the information, and the poor implementation of interoperability standards. The Open Data for Resilience Initiative (OpenDRI) seeks to address these challenges by applying the concepts of open data, community mapping, and open source geospatial software with a keystone role. As a World Bank sponsored initiative, OpenDRI supports DRM programs across the globe to build capacity and long-term ownership of open data projects that rely on open source software like Geonode, QGIS, and InaSAFE. This talk will discuss: Benefits and advantages of using FOSS4G in DRM and development programs Key success stories from OpenDRI and Code for Resilience (CfR) projects Challenges and strategies in building sustainable open source communities for international development and DRM