This document discusses the benefits of free and open source software (FOSS) for community and social development. It defines FOSS as software that provides users with freedom and control, unlike proprietary software where users merely purchase licenses. The document uses examples like Sahana (disaster management), OpenMRS (medical records), and CHITS (community health tracking) to show how FOSS developed in developing countries can be customized, shared freely, and help build technical capacity when communities have access to source code and permissions to use, modify and distribute the software.