The final report and white paper to the Institute of Museum and Library Services (IMLS) for Databib, which was funded by a Sparks! Ignition National Leadership Grant (LG-46-11-0091-11). It gives an overview of the project, its rationale, development process, results, assessment, outreach, challenges and opportunities, and resources. Databib is a open, online catalog of research data repositories that can be found at http://databib.org