Additional resources can be found in the following Library Databases:
Open Access 
and Open Educational Resources
are a great way to find information if you're short on time. However, since OA/OER content can include both scholarly and non-scholarly content more time must be devoted to ensuring it is appropriate to include in your research. Open Access and Open Educational Resources can include books, journals, media, and any other type of digital content. Remember to properly cite your sources, even if they are OA/OER.
Mason OER Metafinder (MOM)The Mason OER Metafinder searches seventeen targets in real-time, including well-known OER repositories like OpenStax, OER Commons, MERLOT but also sites like HathiTrust, DPLA, Internet Archive and NYPL Digital Collections where valuable but often overlooked open educational materials may be found.
OASIS is a meta search tool developed by SUNY Geneseo that searches across 52 different OER sources and includes a range of materials, including textbooks, courses and corresponding materials, interactive simulations, public domain books, audiobooks, modules, open access books, videos and podcasts on a variety of topics — from anthropology to zoology. OASIS also is the only tool that allows users to limit searches by creative commons licenses or by faculty review.