AidData is an initiative that aims to (a) increase the impact of development assistance by making aid information more transparent and accessible to a wide range of stakeholders, and (b) improve the quality of research on aid allocation and aid effectiveness. AidData provides a searchable database of nearly one million past and present aid activities around the world, aid information management services and tools, data visualization technologies, and research designed to increase understanding of development finance. Currently, the AidData team is working with a wide range of development organizations to collect, visualize, and leverage aid information in ways that will improve development policy, practice, and research.