Dalicc
DALICC is a software framework that supports the automated clearance of rights thus supporting the legally secure and time-efficient reutilization of third party data sources. They currently provide several APIs that give you access to their license database and other useful features that simplify the licensing of your derivative works.
If you are interested in their work and in contributing to their open source program join their biweekly meeting. Feel free to consult their website or follow them on Twitter (@dalicc_tech) for regular updates on future work and activities!