Academic Journals: Provides access to full-text articles in the Social Sciences, Biological Sciences, Engineering, Arts & Education, and Legal Studies.
Archive of African Journals: To expand free, online access to the full text of articles from eleven social science and humanities journals published in Africa.
ArXiv.org: 1,106,143 e-prints in Computer Science, Quantitative Finance and Statistics.
California Digital Library eScholarship Editions ebooks: Includes over 500 freely accessible ebooks from academic presses on various topics, including art, humanities, social sciences, science, and literature. E-books are in HTML
Directory of Open Access Books (DOAB): A discovery service for peer-reviewed books published under an Open Access license.
Directory of Open Access Journals (DOAJ): A comprehensive and authoritative list of academic open access repositories for end-users.
E-Books Directory: A daily growing list of freely downloadable ebooks (9425 free e-books in 666 categories), documents, and lecture notes.
EconBiz: To support research in and teaching economics with a central entry point for all subject-specific information and direct access to full texts.
EconPapers: The world's most extensive collection of online Economics working papers, journal articles, and software.
ERIC - Education Resources Information Centre: An online digital education research and information library.
Google Books: Collection of books and magazine issues
Highwirepress: Free online Full-text articles
IDEAS: Database of more than 300,000 economics books, articles, and working papers, many with downloadable full text.
InTech open Books: Largest open access collection of books has published 2,582 books, 5 journals and collaborated with 91,375 international scientists.
OAPEN: The OAPEN Library contains freely accessible academic books, mainly in the area of Humanities and Social Science.
Open Access Publications: Provides immediately free online access to all users worldwide.
Open-Jgate: Comprehensive portal to open access full-text journals from around the world
PQDT Open: Provides the full text of open access dissertations and theses free of charge.
project Guttenberg: Over 45,000 free ebooks
RePEc: Research Papers in Economics: Over 1,800 archives from 86 countries have contributed about 2 million research pieces from 2,300 journals and 4,300 working paper series
SpringerOpen: Includes over 155 peer-reviewed open-access journals across all areas of science
