- APS Journals / Physical Review Online Archive (PROLA)
- Cambridge Journals Online
- ClinicalKey
- EBSCO eBooks Collection (atsevišķas e-grāmatas)
- EBSCO Central & Eastern European Academic Source
- EBSCO PsycARTICLES (LU Primo iekļauti 85 % DB informācijas resursu)
- Emerald eJournals Premier
- JSTOR
- Nature
- OECD iLibrary
- Oxford Journals online
- ProQuest Dissertation and Theses
- ProQuest Ebook Central Academic Complete Collection (atsevišķas e-grāmatas)
- SAGE Journals Online
- SAGE Research Methods
- ScienceDirect
- Scopus
- SpringerLink Contemporary Journals
- Taylor & Francis Social Science & Humanities Library
- Web of Science
- Wiley Online Library E-Journals Full Collection
- ABES: theses.fr
- Academic Journals
- AgEcon Search (Research in Agricultural and Applied Economics) / University of Minnesota
- American Economic Association Journals
- American Institute of Physics Open Access
- American Library Association
- American Mathematical Society (Books Freely Accessible)
- American Museum of Natural History Research Library
- Archives of African Journals Free
- Arxiv / Cornell University
- Astrophysics Data System
- Australian National Data Service
- Austrian Literature Online (ALO)
- Austrian Newspapers Online (ANNO)
- Bentham Science: Open Free
- Bioline International Free
- BioMed Central Free
- BioOne Publishing Open Access
- BioScientifica Journals
- Bloomsbury Qatar Foundation - QScience.com
- British Medical Journal Publishing Open
- Botanicus: Encyclopedia of Historic Botanical Literature / Missouri Botanical Garden Library
- Cambridge University Press Open Access
- Cell Press Free Archives
- CLOCKSS (Controlled LOCKSS ) Free / Stanford University and the University of Edinburgh
- Compact Memory: Collection of Rare Jewish 19th Century Periodicals
- De Gruyter: Open Access
- Defense Technical Information Center: Public Technical Reports
- Digital Himalaya Free
- DigiZeitschriften: Open Access
- Directory of Open Access Journals (DOAJ)
- Directory of Open Access Books (DOAB)
- Dove Press Free
- E-Books Collection, 1982-2004 / University of California, California Digital library
- EconPapers (RePEc)
- eDoc.ViFaPol: Fachinformationen für Politikwissenschaft, Verwaltungswissenschaft und Kommunalwissenschaften / Staats- und Universitätsbibliothek Hamburg (SUB Hamburg)
- ERIC / U.S. Department of Education
- Érudit Open Access Journals
- European Mathematical Information Service (EMIS) Free
- European Union Publications Free
- Exeley Open Access Journals
- eWIC Workshops in Computing /BCS, The Chartered Institute for IT
- Free Medical Journals / By Bernd Sebastian Kamps
- Gallica Digital Library / Bibliothèque Nationale de France
- GERFLINT Synergies / Groupe d’Etudes et de Recherches pour le Français Langue Internationale
- GIGA Journal Family / German Institute of Global and Area Studies
- Online-Zeitschriften Hamburg University Press
- HAL (Hyper Article en Ligne) Open Archive / Centre pour la Communication Scientifique Direct
- HathiTrust Digital Library Open Access
- HBO Kennisbank / research output and theses from Dutch Universities of Applied Sciences
- Highwire Press Free
- Hindawi Publishing: Open Access Books, Journals
- IEEE Open Access Publishing
- Inderscience Publishers Open Access Journals
- INFORMS Journals
- Ingenta Connect / Society for Free Radical Research (Australasia)
- In TechOpen
- International Scholarly Research Network (ISRN) journals
- Internet Scientific Publications – ispub.com
- IOP Publishing: Open Access Journals
- Karger Open Access Journals
- Korea Science / Korea Institute of Science and Technology Information
- Library of Congress Digitized collections
- Linda Hall Library Digital Collections
- Luna Imaging Collections / California Digital Library
- Manuscripts of the National Library of the Czech Republic “Manuscriptorium”
- Mary Ann Liebert Online - Open Access
- Medknow Publications Open Access Journals
- NASA Technical Reports Server (NTRS)
- National Academies Press Free eBooks
- Nature Free
- NCBI Bookshelf and PubMed Free
- NetLibrary Publicly Accessible eBooks
- New York Public Library Digital Collections
- Newfound Press Books
- Newsbank Access World News
- Norwegian and Nordic Index to Periodical Articles (Norart)
- Norwegian Open Research Archives (NORA)
- Online Textbook Library / University of Minnesota. Center for Open Education
- Open Access Publishing in European Networks (OAPEN) Library
- OpenEdition Books Free
- OpenStax Digital Textbooks / Rice University
- Open SUNY Textbooks / State University of New York
- Oxford University Press Journals Open Access
- Persée Digital Library
- PoPuPS: Portail de Publication de Periodiques Scientifiques / University of Liège Libraries
- Project Euclid Open Access
- Project Gutenberg
- Public Library of Science (PLoS)
- PubMedCentral / U.S. National Library of Medicine
- Purdue University Press Open Access Journals
- Repositório Cientfico de Acesso Aberto de Portugal
- Royal Society Publishing Open Access Journals
- SA Open Access ePublications / Sabinet
- SciELO Livros - Open Access
- SciTech Connect / U.S. Deptament of Energy. Office of Scientific and Technical Information
- ScienceALERT Free
- Scientific Research Publishing (SCIRP)
- SCOAP3 Repository / Sponsoring Consortium for Open Access Publishing in Particle Physics
- Searchable Ornithological Research Archive SORA
- Smithsonian Research Online / Smithsonian Institution Libraries
- Springer Link Open Access Journals
- Symposium-Journals Free
- SwePub / National Library of Sweden
- Swiss Electronic Library e-lib.ch
- Taylor & Francis Group's Open Journals
- TERRAPUB e-Library
- The Chemical Society of Japan Journals
- Thieme Connect Free e-Journals
- Universitatsbibliothek Bielefeld Free
- Welsh Journals Online / National Library of Wales
- Wikipedia, The Free Encyclopedia
- Wiley Open Access
- World Scientific Open Journals
- ARAN (National University of Ireland Galway)
- Bergen Open Research Archive [BORA] / University of Bergen
- CERES (Cranfield Collection of E-Research) / Cranfield University
- Die digitale Landesbibliothek Oberösterreich / Upper Austrian Federal State Library
- Digital Access to Scholarship at Harvard (DASH) / Harvard University, Office for Scholarly Communication
- Digital Commons @SPU / Seattle Pacific University
- Digital Repository @Iowa State University / Iowa State University
- DigitalCommons@McMaster / McMaster University Library
- Digitale Sammlungen / Universitätsbibliothek Paderborn
- DiscoverArchive / Vanderbilt University
- DiVA - Academic Archive Online / Uppsala University Library
- Dokumentenserver der FU Berlin / Freie Universitat Berlin
- DSpace@Cambridge / University of Cambridge
- ECLAC Digital Repository / Economic Commission for Latin America and the Caribbean
- Edinburgh Research Archive / University of Edinburgh
- eScholarship : California Digital Library / University of California
- Fraunhofer ePrints / Fraunhofer Gesellschaft
- Ghent University Academic Bibliography / Ghent University
- Infoscience / École Polytechnique Fédérale de Lausanne (EPFL)
- Inter-American Development Bank Repository
- Iowa Research Online / University of Iowa Libraries
- Kent Academic Repository / University of Kent
- Leeds Beckett University Repository / Leeds Beckett University
- Leiden University Repository
- Lirias / Katholieke Universiteit Leuven Association
- Loughborough University Institutional Repository
- LSE Learning Resources Online / London School of Economics and Political Science
- LSE Research Online / London School of Economics and Political Science
- LSE Theses Online / London School of Economics and Political Science
- MADOC Publikationsserver / Mannheim University Library
- Manchester eScholar / Manchester University
- Open Access LMU / Universitätsbibliothek der LMU Muenchen
- Opus: Online Publications Store / University of Bath
- ORBi (Open Repository and Bibliography) / University of Liège
- OUR@oakland / Oakland University
- PUCRS Institutional Repository / Pontifical Catholic University of Rio Grande do Sul
- Repositori Digital de la UPF / Universitat Pompeu Fabra
- Repositorio Digital de Tesis PUCP / Pontificia Universidad Catolica del Peru
- Repository Utrecht University
- Research Repository / RMIT University
- RiuNet /Universitat Politècnica de València
- ROAR: University of East London Repository
- Scholar Commons / University of South Florida
- SHAREOK Repository / University of Oklahoma/Oklahoma State University
- Sydney eScholarship Repository / University of Sydney
- TEORA / Telemark University College
- The Hong Kong University of Science and Technology Library: Institutional Repository
- The Portal to Texas History / University of North Texas
- ThinkTech / Texas Tech University
- UBIRA ePapers ; eTheses / University of Birmingham
- UCL Discovery / University College London
- Unitec Research Bank / Unitec Institute of Technology
- University of Guelph Theses and Dissertations
- UNT Digital Library / University of North Texas
- VCU Scholars Compass /Virginia Commonwealth University
- White Rose Research Online / White Rose University Consortium
- ZORA / University of Zurich