Internet Public Library
https://www.ipl.org

• A reservoir of Indian theses
  https://shodhganga.inflibnet.ac.in

ERIC (Education Resources Information Center)
https://eric.ed.gov

• Repository of Research in Progress/Synopses
  https://shodhgangotri.inflibnet.ac.in

  • Library of Congress : Digital Collections
    https://www.loc.gov/collections

New York Public Library Digital Gallery
https://digitalcollections.nypl.org

• Directory of Open Access Journals
  https://www.doaj.org

Google Scholar
https://scholar.google.com

• Google Books
  https://books.google.com/?hl=en

• Highwire (Stanford Univ)
  https://portal.highwire.org/lists

• National Digital Library of India
  https://ndl.iitkgp.ac.in

• Project Muse : Article Search
  http://muse.jhu.edu

• Journal Seek
  http://www.journalseek.net

  • Heriot-Watt University Scotland
    https://www.hw.ac.uk/uk/schools/mathematicalcomputer-sciences.htm

• US News Archives on the Web
  http://www.ibiblio.org/slanews/internet/archives

  • Social Sciences Research Network
    https://www.ssrn.com/index.cfm/en

• Mag Portal
  http://www.magportal.com

  • Library of Congress Database and E-Resources
    https://eresources.loc.gov

• Open My Library
  https://openlibrary.org

  • Open J-Gate
    https://portal.highwire.org/lists

• National Digital Library of India
  http://www.openj-gate.com

  • Making of America (Digital Library)
    http://quod.lib.umich.edu/m/moagrp

  • Public Library of Science
    http://www.plos.org

  • Open Access Journals
    https://www.omicsonline.org/scholarly-openaccess-journals.php

    • Online College.com : Excellent Open Access Journals for Educators
      http://bit.ly/b8NrQL

  • Univ of Virginia Tech : Digital Library and Archives Search
    https://lib.vt.edu/find-borrow/digital-library.html

• Open Humanities Press
  http://www.openhumanitiespress.org

  • Academic Journals
    https://academicjournals.org/journal

• Scitable
  http://www.nature.com/scitable/topics

  • CQ Press in Context
    http://www.cqpress.com/incontext

• News and Newspapers Online
  https://epaper.hindustantimes.com

• Online Newspapers
  http://www.onlinenewspapers.com

  • Wikipedia List of Online Newspaper Archives
    http://bit.ly/c63fCc

  • Internet Public Library Newspapers
    https://www.ipl.org/

• Open Science Directory
  http://www.opensciencedirectory.net

  • Free Full Text (site has changed, this is the archived site)
    h http://web.archive.org/web/20051031012522/http://www.freefulltext.com

  • E-Prints in Library and Information Science
    http://eprints.rclis.org

  • OCLC Oaister
    http://oaister.worldcat.org

    • Free Full Text Chemistry Journals
      http://www.abc.chemistry.bsu.by/current/fulltext.htm

  • Oxford Journals
    http://www.oxfordjournals.org

  • Perry Castaneda Map Collection (Univ of Texas)
    https://maps.lib.utexas.edu/maps

  • Complete Planet Nasa
    https://solarsystem.nasa.gov

    • A to Z Maps Online
      http://www.atozmapsonline.com

  • Library of Congress Country Studies (Similar to Lands and People database)
    https://www.loc.gov/collections/countrystudies/about-this-collection

    • Chemistry Central (open access chemistry journals)
      http://www.chemistrycentral.com

      • PhysMath (open access physics journals)
        http://www.physmathcentral.com

  • Hindawi Publishing Open Access Journals (covering agriculture, dentistry, biology, ecology, mathematics, social and hard sciences, technology, and medicine)
    http://www.hindawi.com/journals

  • MDPI Open Access Journals (covering topics in science, math, medicine and even a journal on gaming theory!)
    http://www.mdpi.com/about/journals

  • OpenDOAR (Directory of Open Access Repositories - provides searchable access to academic digital repositories with content in a variety of subjects)
    http://www.opendoar.org/index.html

  • Repository of Primary Sources for the Western US and Canada
    https://www.lib.uidaho.edu/collections

    • Smithsonian Institution Collection Search
      https://collections.si.edu/search

  • Open Thesis
    https://oatd.org

    • Internet Archive
      http://www.archive.org

  • All India Council For Technical Education
    https://ekumbh.aicte-india.org/allbook.php

  • An International Electronic Journal of Mathematics
    https://www.emis.de/journals/AMEN

    • Database of Free / Open Access Online Computer Science Books, Textbooks, and Lecture Notes
      https://www.freetechbooks.com

  • Links to Free Computer, Mathematics, Technical Books all over the World
    https://freecomputerbooks.com

  • Unesco Database
    http://www.unesco.org/new/en/unesco/resource%20s/online-%20materials/publications/unesco-database

    • CIA World Fact Book
      https://www.cia.gov/library/publications/theworld-factbook

  • Lots of Books
    https://www.pdfbooksworld.com

  • Lots of Books
    https://manybooks.net

    • Lots of Books
      https://bookboon.com

  • Lots of Books
    https://www.gutenberg.org

  • American Society of Microbiology
    http://mbio.asm.org

    • New England Journal of Medicine
      https://www.nejm.org

    • BioMed Central Open Access Journals A-Z
      http://www.biomedcentral.com/browse/journals

    • Economics E-Journal
      https://www.degruyter.com/journal

    • List of open access journals in Ancient Studies (a very extensive list in a variety of sub-topics)
      http://ancientworldonline.blogspot.com/2015/12/alphabetical-list-of-open-access.html

    • Legal Information Institute
      http://www.law.cornell.edu

  • LOC Chronicling America - Historic American Newspapers
    http://chroniclingamerica.loc.gov

  • Library of Congress : American Memory Collection
    https://memory.loc.gov/ammem/index.html

    • Database of Award Winning Children's Literature
      http://www.dawcl.com

      • Children's Poetry Archive
        http://www.poetryarchive.org

  • Avalon Project
    http://avalon.law.edu/default.asp

• Free Medical Journals
  http://www.freemedicaljournals.com

  • Med Know
    http://www.medknow.com/journals.asp

  • Statistical Abstract of the United States
    https://www.census.gov/library/publications/time -series/statistical_abstracts.html