Databases A–Z
arXiv
Open access preprints in physics, math, CS, and more.
CORE
Aggregated open access research papers and metadata.
Directory of Open Access Books (DOAB)
Quality‑assured open access books.
Directory of Open Access Journals (DOAJ)
Open access journals and articles.
ERIC
Education research index.
Internet Archive
Digital library of books, media, and web pages.
Open Library
Open, editable library catalog.
OER Commons
Open educational resources.
Project Gutenberg
Free eBooks of public domain works.
PubMed Central (PMC)
Free full‑text biomedical and life sciences journal literature.