Directory of open access books (DOAB)

The Directory of Open Access Books (DOAB) is a discovery service for peer reviewed books published under an open access licence. DOAB provides a searchable index to the information about these books, with links to the full texts of the publications at the publisher's website or repository.

Directory of open access journals (DOAJ)

DOAJ is an online directory that indexes and provides access to high quality, open access, peer-reviewed journals, covering all subjects and languages.

InTechOpen

InTechOpen is the publisher of the world's largest collection of open access books covering the fields of Science, Technology and Medicine. With a goal to provide free online access to research since 2004, InTechOpen has published 2,742 books and 45,385 scientific works by 95,309 international scientists.

Open Access Theses and Dissertations (OATD)

OATD.org aims to be the best possible resource for finding open access graduate theses and dissertations published around the world. Metadata comes from over 1000 colleges, universities, and research institutions. OATD currently indexes 2,963,527 theses and dissertations.

UNESCO

Contains UNESCO documents in full text published since 1956 as well as metadata from the collections of the UNESCO Library and documentation centres in Field Offices and Institutes