Contains thousands of free available datasets in the fields of humanities, archaeology, geospatial sciences, and behavioural and social sciences.
DANS is the Dutch national centre of expertise and repository for research data.
ICPSR (Inter-University Consortium for Political and Social Research) maintains a data archive of more than 250,000 files of research in the social sciences. It hosts 21 specialized collections of data in education, aging, criminal justice, substance abuse, terrorism, and other fields.
Books, journals and statistical databases from the Organisation for Economic Co-operation and Development (OECD).