1. APS Journals / Physical Review Online Archive (PROLA)
  2. Cambridge Journals Online
  3. Dawsonera
  4. EBSCO eBooks Collection
  5. EBSCO national package
  6. EBSCO PsycARTICLES
  7. EBSCO Business Source Complete
  8. Emerald EMeJ 175
  9. Encyclopedia Britannica Online Academic Edition
  10. JSTOR
  11. OECD iLibrary
  12. Oxford Journals
  13. Project Muse
  14. ProQuest Academic Complete
  15. ProQuest Dissertation and Theses
  16. ProQuest Ebook Library
  17. SAGE Journals Online
  18. SAGE Research Methods
  19. ScienceDirect
  20. Scopus
  21. SpringerLink
  22. Taylor & Francis Social Science & Humanities Library
  23. Times Higher Education
  24. UpToDate (Kluwer)
  25. Web of Science
  1. ABES: theses.fr
  2. Academic Journals
  3. AgEcon Search (Research in Agricultural and Applied Economics) / University of Minnesota
  4. American Economic Association Journals
  5. American Institute of Physics Open Access
  6. American Library Association
  7. American Mathematical Society (Books Freely Accessible)
  8. American Museum of Natural History Research Library
  9. Archives of African Journals Free
  10. Arxiv / Cornell University
  11. Astrophysics Data System
  12. Australian National Data Service
  13. Austrian Literature Online (ALO)
  14. Austrian Newspapers Online (ANNO)
  15. Bentham Science: Open Free
  16. Bioline International Free
  17. BioMed Central Free
  18. BioOne Publishing Open Access
  19. BioScientifica Journals
  20. Bloomsbury Qatar Foundation – QScience.com
  21. British Medical Journal Publishing Open
  22. Botanicus: Encyclopedia of Historic Botanical Literature / Missouri Botanical Garden Library
  23. Cambridge University Press Open Access
  24. Cell Press Free Archives
  25. CLOCKSS (Controlled LOCKSS ) Free / Stanford University and the University of Edinburgh
  26. Compact Memory: Collection of Rare Jewish 19th Century Periodicals
  27. De Gruyter: Open Access
  28. Defense Technical Information Center: Public Technical Reports
  29. Digital Himalaya Free
  30. DigiZeitschriften: Open Access
  31. Directory of Open Access Journals (DOAJ)
  32. Directory of Open Access Books (DOAB)
  33. Dove Press Free
  34. E-Books Collection, 1982-2004 / University of California, California Digital library 
  35. EconPapers (RePEc)
  36. eDoc.ViFaPol: Fachinformationen für Politikwissenschaft, Verwaltungswissenschaft und Kommunalwissenschaften / Staats- und Universitätsbibliothek Hamburg (SUB Hamburg)
  37. ERIC / U.S. Department of Education
  38. Érudit Open Access Journals
  39. European Mathematical Information Service (EMIS) Free
  40. European Union Publications Free
  41. Exeley Open Access Journals
  42. eWIC Workshops in Computing /BCS, The Chartered Institute for IT
  43. Free Medical Journals / By Bernd Sebastian Kamps
  44. Gallica Digital Library / Bibliothèque Nationale de France
  45. GERFLINT Synergies / Groupe d’Etudes et de Recherches pour le Français Langue Internationale
  46. GIGA Journal Family / German Institute of Global and Area Studies
  47. Online-Zeitschriften Hamburg University Press
  48. HAL (Hyper Article en Ligne) Open Archive / Centre pour la Communication Scientifique Direct
  49. HathiTrust Digital Library Open Access
  50. HBO Kennisbank / research output and theses from Dutch Universities of Applied Sciences
  51. Highwire Press Free
  52. Hindawi Publishing: Open Access Books, Journals
  53. IEEE Open Access Publishing
  54. Inderscience Publishers Open Access Journals
  55. INFORMS Journals
  56. Ingenta Connect / Society for Free Radical Research (Australasia)
  57. In TechOpen
  58. International Scholarly Research Network (ISRN) journals
  59. Internet Scientific Publications – ispub.com
  60. IOP Publishing: Open Access Journals
  61. Karger Open Access Journals
  62. Korea Science / Korea Institute of Science and Technology Information
  63. Library of Congress Digitized collections
  64. Linda Hall Library Digital Collections
  65. Luna Imaging Collections / California Digital Library
  66. Manuscripts of the National Library of the Czech Republic "Manuscriptorium"
  67. Mary Ann Liebert Online – Open Access
  68. Medknow Publications Open Access Journals
  69. NASA Technical Reports Server (NTRS)
  70. National Academies Press Free eBooks
  71. Nature Free
  72. NCBI Bookshelf and PubMed Free
  73. NetLibrary Publicly Accessible eBooks
  74. New York Public Library Digital Collections
  75. Newfound Press Books
  76. Newsbank Access World News
  77. Norwegian and Nordic Index to Periodical Articles (Norart)
  78. Norwegian Open Research Archives (NORA)
  79. Online Textbook Library / University of Minnesota. Center for Open Education
  80. Open Access Publishing in European Networks  (OAPEN) Library
  81. OpenEdition Books Free
  82. OpenStax Digital Textbooks / Rice University
  83. Open SUNY Textbooks / State University of New York
  84. Oxford University Press Journals Open Access
  85. Persée Digital Library
  86. PoPuPS: Portail de Publication de Periodiques Scientifiques / University of Liège Libraries
  87. Project Euclid Open Access
  88. Project Gutenberg
  89. Public Library of Science (PLoS)
  90. PubMedCentral / U.S. National Library of Medicine
  91. Purdue University Press Open Access Journals
  92. Repositório Cientfico de Acesso Aberto de Portugal
  93. Royal Society Publishing Open Access Journals
  94. SA Open Access ePublications / Sabinet
  95. SciELO Livros – Open Access
  96. SciTech Connect / U.S. Deptament of Energy. Office of Scientific and Technical Information
  97. ScienceALERT Free
  98. Scientific Research Publishing (SCIRP)
  99. SCOAP3 Repository / Sponsoring Consortium for Open Access Publishing in Particle Physics
  100. Searchable Ornithological Research Archive SORA
  101. Smithsonian Research Online / Smithsonian Institution Libraries
  102. Springer Link Open Access Journals
  103. Symposium Journals Free
  104. SwePub / National Library of Sweden
  105. Swiss Electronic Library e-lib.ch
  106. Taylor & Francis Group's Open Journals
  107. TERRAPUB e-Library
  108. The Chemical Society of Japan Journals
  109. Thieme Connect Free e-Journals
  110. Universitatsbibliothek Bielefeld Free
  111. Welsh Journals Online / National Library of Wales
  112. Wikipedia, The Free Encyclopedia
  113. Wiley Open Access
  114. World Scientific Open Journals
  1. ARAN (National University of Ireland Galway)
  2. Bergen Open Research Archive [BORA] / University of Bergen
  3. CERES (Cranfield Collection of E-Research) / Cranfield University
  4. Die digitale Landesbibliothek Oberösterreich / Upper Austrian Federal State Library
  5. Digital Access to Scholarship at Harvard (DASH) / Harvard University, Office for Scholarly Communication
  6. Digital Commons @SPU / Seattle Pacific University
  7. Digital Repository @Iowa State University / Iowa State University
  8. DigitalCommons@McMaster / McMaster University Library
  9. Digitale Sammlungen / Universitätsbibliothek Paderborn
  10. DiscoverArchive / Vanderbilt University
  11. DiVA – Academic Archive Online / Uppsala University Library
  12. Dokumentenserver der FU Berlin / Freie Universitat Berlin
  13. DSpace@Cambridge / University of Cambridge
  14. ECLAC Digital Repository / Economic Commission for Latin America and the Caribbean
  15. Edinburgh Research Archive / University of Edinburgh
  16. eScholarship : California Digital Library / University of California
  17. Fraunhofer ePrints / Fraunhofer Gesellschaft
  18. Ghent University Academic Bibliography / Ghent University
  19. Infoscience / École Polytechnique Fédérale de Lausanne (EPFL)
  20. Inter-American Development Bank Repository
  21. Iowa Research Online / University of Iowa Libraries
  22. Kent Academic Repository / University of Kent
  23. Leeds Beckett University Repository / Leeds Beckett University
  24. Leiden University Repository
  25. Lirias / Katholieke Universiteit Leuven Association
  26. Loughborough University Institutional Repository
  27. LSE Learning Resources Online / London School of Economics and Political Science
  28. LSE Research Online / London School of Economics and Political Science
  29. LSE Theses Online / London School of Economics and Political Science
  30. MADOC Publikationsserver / Mannheim University Library
  31. Manchester eScholar / Manchester University
  32. Open Access LMU / Universitätsbibliothek der LMU Muenchen
  33. Opus: Online Publications Store / University of Bath
  34. ORBi (Open Repository and Bibliography) / University of Liège
  35. OUR@oakland / Oakland University
  36. PUCRS Institutional Repository / Pontifical Catholic University of Rio Grande do Sul
  37. Repositori Digital de la UPF / Universitat Pompeu Fabra
  38. Repositorio Digital de Tesis PUCP / Pontificia Universidad Catolica del Peru
  39. Repository Utrecht University
  40. Research Repository / RMIT University
  41. RiuNet /Universitat Politècnica de València
  42. ROAR: University of East London Repository
  43. Scholar Commons / University of South Florida
  44. SHAREOK Repository / University of Oklahoma/Oklahoma State University
  45. Sydney eScholarship Repository / University of Sydney
  46. TEORA / Telemark University College
  47. The Hong Kong University of Science and Technology Library: Institutional Repository
  48. The Portal to Texas History / University of North Texas
  49. ThinkTech / Texas Tech University
  50. UBIRA ePapers; eTheses / University of Birmingham
  51. UCL Discovery / University College London
  52. Unitec Research Bank / Unitec Institute of Technology
  53. University of Guelph Theses and Dissertations
  54. UNT Digital Library / University of North Texas
  55. VCU Scholars Compass /Virginia Commonwealth University
  56. White Rose Research Online / White Rose University Consortium
  57. ZORA / University of Zurich