OATD aims to be the best possible resource for finding open access graduate theses and dissertations published around the world. Metadata (information about the theses) comes from over 600 colleges, universities, and research institutions. OATD currently indexes over 1.5 million theses and dissertations.
SHERPA/RoMEO provides authors with the ability to see what is "legal" for them to do with copies of their manuscript, such as posting manuscripts to pre-print and post-print servers. To search for a journal's policies, simply search for the journal name from the SHERPA/RoMEO homepage.
SPARC is a global coalition committed to making open access the default for research and education. SPARC provides resources and news surrounding the open access movement, including open data and open education resources (OER).