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BMC publishes around 200 open access journals related mainly to medicine and biology.
Brill is an international academic publisher that specialises in humanities, social sciences, law and ecclesiology. Brill has got both journals and books under its open access collection.
Cambridge Core(external link)
All the academic content of Cambridge University Press is available from this link. Though everything is not freely downloadable, CUP provides access to both its journals and books. Users can make a free account in the site and have the option to filter their results just to freely accessible ones. All Cambridge Core resources are not immediately listed in academic search engines. A list of open access journals and books of CUP is available from this page(external link).
De Gruyter Open(external link)
In the general search page of De Gruyter, users can filter their results to open and free access content, which bring in resources ranging from books to book chapters to journal articles. De Gruyter publishes around 100 open access journals(external link).
Elsevier Open(external link)
Provides access to all open access journals published by Elsevier. Users can search the collection using key words, subject terms and journal title.
Frontiers is one of the world’s leading open access publishers, and one of the top five most cited journal publishers. Frontiers publishes more than 130 journals, and users can make journal level, as well as article level searches, which can be then refined by subject. Though most Frontiers journals are included in open access journal aggregators like DOAJ, many new journals are not featured.
Intech Open(external link)
Intech Open publishes peer reviewed open access books by subject fields ranging from physical sciences to humanities.
JSTOR Open(external link)
Open source content from JSTOR, including journal articles, books, and research reports, can be accessed. Resources from South Asia Open Archives(external link), a curated collection of key historical and contemporary sources in arts, humanities and social sciences, from and about South Asia, could also be accessed from JSTOR open.
MDPI is one of the pioneers in open access publishing that has around 370 journals in its collection. Though many of its journals feature on open access journal aggregators like DOAJ, this portal facilitates extensive search through the full portfolio of its journals.
MIT open(external link)
Access to books and journals published by Massachusetts Institute of Technology. As many of these journals are hybrid ones, not fully open access, it is good to search using MIT journals(external link) link, which provides search filters for open access and free ones.
National Academic Press Open(external link)
The National Academies Press (NAP) publishes the reports of the National Academies of Sciences, Engineering, and Medicine of USA, and provides free access to more than 10,000 books.
Oxford University Press(external link)
Provides access to all open access resources available with Oxford University Press. Oxford university follows a graded access policy regarding its open resources. While most of its new journals are published under open access, older ones are not providing all their articles free.
Project Muse Open(external link)
Books and journals freely accessible through Project Muse are accessible in this link. Most of these titles are not listed in open access databases like DOAJ that compiles resources from open access sources.
Public Library of Science(external link)
Public Library of Science is one of the leading open access publishing houses with journals having rigorous peer reviewing process and high impact factor. They mainly focus on medicine, biology and genetics.
Springer Nature(external link)
Provides access to both open access journal articles and books published through the imprints of Springer, such as Springer Open, BioMedCentral, nature portfolio, Palgrave MacMillan and Apress. Users need to go to the links of each imprint to access free eBooks.
Springer Open(external link)
Provides access to all open access journal articles published by Springer. Springer’s broader web site. Springer(external link) allows access to books too, but users have to search through non-accessible resources to find open access ones, which are clearly marked.
Taylor and Francis Open(external link)
Allows access to all online content available through imprints of Taylor and Francis group, such as Routledge, Dove Press, Cogent OA, F1000Research. You can also browse journals by subject and, in addition, access their eBooks(external link).