Open Access Platforms & Digital Archives

Open Access (OA) platforms and archives provide free online access to books, journal articles, digitized primary sources and archival materials, digital cultural artifacts, reference resources, grey literature like thesis & dissertations, government resources, institutional repositories, etc.

Below you can find some OA platforms & archives providing different information resources and contents.

Zentralblatt MATH (zbMATH)

zbMATH, well-known under its former name Zentralblatt MATH, contains more than 3.7 million entries drawn from more than 3,000 current journals and serials and 170,000 books, with coverage across mathematics, statistics, computer sciences and the applications of these disciplines in engineering, physics, and the life sciences.

OA Book Platforms & Archives

DOAB -Directory of Open Access Books

DOAB is a joint-discovery service of OAPEN, OpenEdition, CNRS, and Aix-Marseille Université, and provides access to more than 27900 academic peer-reviewed access books from 379 publishers.

HathiTrust Digital Library

HathiTrust is a partnership of educational and research institutions, offering a collection of millions of titles digitized by partner libraries.

Internet Archive

The Internet Archive (, founded in 1996, provides access to digitized books and other digital artifacts. Some books cannot be downloaded as PDF. However, they can be borrowed by one patron at a time for 14 days. Borrowing is manageable through a free account and Adobe Digital Editions.

JSTOR Open Access Books

More than 6,000 ebooks from 75+ publishers, including Brill, Cornell University Press, De Gruyter, and University of California Press, are now available for everyone.


The OAPEN is an online library and publication platform that contains freely accessible academic books, mainly in the area of humanities and social sciences.

Open Book Publishers

Open Book Publishers, an independent open access publisher in the humanities and social sciences, publishes books in hardcopy format as well as free online editions in PDF, HTML, and XML formats that can be read via the website, downloaded, reused or embedded anywhere.


OpenEdition is a French platform for electronic resources in the humanities and social sciences that provides access to more than 9000 books under the OpenEdition Books.

Project Gutenberg

Project Gutenberg is a library that provides free access to over 60,000 free ebooks from the world’s great literature with a focus on older works for which U.S. copyright has expired. You can choose among HTML, epub, kindle, plain text vs. formats to download them or read the books online.

Project Muse Open Access

Poject Muse offers open access journals and books from several distinguished university presses and scholarly societies.

Springer Open

SpringerOpen provides open access journals and books from all areas of science, technology, medicine, the humanities, and social sciences.

Standard Ebooks

Standard Ebooks is a volunteer-driven, not-for-profit effort to produce a collection of high quality, carefully formatted, accessible, open-source, and free public domain ebooks.

OA Journal Platforms & Archives


The COnnecting REpositories (CORE) aggregates all open access research outputs from repositories and journals worldwide and makes them available to the public.


CiteSeerX is a digital library search engine providing free access to more than 5 million scholarly documents, focused primarily on the literature in computer and information science.

DOAJ-Directory of Open Access Journals

The Directory of Open Access Journals (DOAJ) is a pan-disciplinary resource that allows users to identify and search free, full text, quality controlled open-access scientific and scholarly journals.


EconPapers provides access to RePEc (Research Papers in Economics), a collection of online Economics working papers, journal articles, and software.


OpenEdition is a French platform for electronic resources in the humanities and social sciences that provides access to more than 500 journals under the OpenEdition Journals.


Science Open is a freely available search and discovery platform that provides more than 60 million articles, mostly in medicine and health sciences.


Scilit, developed and maintained by the open-access publisher MDPI, is a multidisciplinary, free scholarly database that indexes scientific material by extracting the latest data from CrossRef and PubMed daily.

TR Dizin

TRDizin is a platform created by ULAKBİM that hosts and indexes national journals in the fields of science and social sciences, dentistry, pharmacy, engineering, health sciences as well as social sciences and the humanities.

Open Archives & Institutional Repositories

Aperta (TÜBİTAK Open Archive)

Aperta is the open access repository of TÜBİTAK.


ArXiv is an archive for preprint scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics.

COAR-Confederation of Open Access Repositories

COAR is a global repository of open access repositories of more than 150 member and partner libraries, universities, research institutions, government funders, and others.

Harman (Turkey Academic Archive)

Harman is the national repository of the open archives of universities, public and research institutions in Turkey.


OAISter is a freely accessible repository containing over 25 million records from all disciplines and subjects contributed by over 1,000 libraries, archives, and repositories.


OpenAIRE is a European open science infrastructure providing a network of open access repositories, archives, and journals that support OA policies.

OpenDoar-Directory of Open Access Repositories

The Directory of Open Access Repositories (OpenDoar) is a global directory of more than 5322 countries’ open access repositories and their policies.

ROAR-Registry of Open Access Repositories

The Registry of Open Access Repositories (ROAR) lists and shows the growth and status of open access repositories throughout the world.

SSOAR-Social Science Open Access Repository

The Social Science Open Access Repository (SSOAR) is a database of social science literature maintained by the Leibniz Institute for the Social Sciences and provides free access to more than 55.000 publications.


Zenodo is a catch-all repository launched by CERN, an OpenAIRE partner, and pioneer in open source, open access, and open data.

OA Digitized Archives

Archaeological Analytics

Archaeological Analytics is a digital library of open-access US and Canadian archaeological collections.

Das Bundesarchiv

The “Das Bundesarchiv” enables access to the digitized fonds of the Federal Archive.

The Caltech Archives

The California Institute of Technology “Caltech Archives” holdings include a wide range of materials, from manuscripts to photographs, to audio-visual materials, books, fine art, and artifacts.

Digital Bodleian

Digital Bodleian is an interface for the digitized holdings of the Bodleian Library, including manuscripts and maps.

Europeana Collections

Europeana provides access to over 50 million digitized items – books, music, artworks, and more – of European archives, libraries, and museums.

Gallica – BnF Digital Library

Gallica is the digital library of the Bibliothèque Nationale de France (BnF) and the national aggregator for collections held in French cultural heritage institutions. The collection includes printed materials (books, journals, newspapers, printed music, and other documents), graphic materials (engravings, maps, photographs, and others), and sound recordings.

German Digital Library

The German Digital Library provides access to a collection of Germany’s cultural and scientific heritage, that is, millions of books, archived items, images, sculptures, pieces of music, and other sound documents, as well as films and scores, from all over Germany.

Library of Congress Digital Collections

The LoC Digital Collections is a digital library of manuscripts, photos, audio recordings, notated music, books, films, maps, and newspapers.

Maps, Globes & Plans

Maps, Globes & Plans is an aggregator website for digital maps and atlases of some institutions, including Library of Congress, Gallica, British Library, French Diplomatic Archives, Moravian Library (Czech Republic), Harvard Library and so.

Oxford Text Archive (OTA)

OTA is an open archive for high-quality digital resources for research and teaching in more than 25 languages.


Salt Research provides access to archival materials related to modern Turkey and its history via its “Art, Architecture and Design and City, Society and Economy collections.

TBMM Digital Archive

The TBMM Digital Archive enables access to the digital resources of the Library of TBMM and its legislative / audit activities produced in the Turkish Grand National Assembly.

British Library Online Gallery

The British Library Online Gallery is a gallery of  British Library holdings such as old maps, virtual books as well as exhibitions and highlights.

David Rumsey Map Collection

The David Rumsey Map Collection is a collection of rare 16th through 21st-century maps of North and South America, as well as maps of the World, Asia, Africa, Europe, and Oceania. There are over 150.000 maps.

New York Public Library Digital Collections

The NYPL Digital Collections enables access to 890,355 items digitized from The New York Public Library’s collections.

World Digital Library

The World Digital Library, created and curated with the support of the Library of Congress and UNESCO, provides free access to 19.147 items -manuscripts, rare books, maps, photographs, and other relevant cultural documents- from 193 countries and cultures between 8000 BCE and 2000.

Other Digital Library Collections & Archives of Universities

Many university libraries have digitized some of their special collections and made them freely available to everyone. Please find below some of such digitized special collections that include rare books, archival documents, manuscripts, maps, photographs, letters, newspapers, posters, reports, and other materials.

OA Thesis & Dissertation Platforms


DART-Europe, a partnership of European research libraries and library consortia, provides global access to 28,729 open access research theses from 619 universities in 28 European countries.


EThOS is the UK’s national thesis service holding 500,000 doctoral theses from over 120 institutions. Around 260,000 of these theses are full-text and can be downloaded from the EThOS database or the related institution’s repository.

Thesis Canada

Thesis Canada, launched in 1965, is a collaborative program between Library and Archives Canada (LAC) and Canadian universities,  enabling access to thousands of theses and dissertations from participating universities.

NDLTD-Networked Digital Library of Theses and Dissertations

The Networked Digital Library of Theses and Dissertations (NDLTD) is a collaborative effort of universities around the world to promote creation, access to, and preservation of electronic theses and dissertations (ETDs) from academic institutions around the world. The NDLTD catalog “Global EDT Search” provides access to over a million ETDs.

CoHE Thesis Center (Turkey)

The Turkish Council of Higher Education gathers and enables free access to all the theses and dissertations written in academic institutes in Turkey. CoHE Thesis Center is the national thesis center of Turkey.

Trove Australian Theses

The National Library of Australia’s Trove service enables browsing almost a million theses, some of these are in print format only, others are available online in digital format.

EBSCO Open Dissertations

EBSCO Open Dissertations, a free database created by EBSCO and BiblioLabs, enables  search and access to thousands of dissertations from around the world.

Shodhganga Indian Theses

Shodhganga is the repository of Indian Electronic Theses & Dissertations.

The Open Access Theses and Dissertations (OATD) is a platform for open access graduate theses and dissertations published around the world.


The PQDT Open, a service of ProQuest, enables reading the full text of open access dissertations and theses free of charge.