Free resources
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Howard-Tilton Memorial LibraryTulane University library's research guide for Alumni offers research databases, ebook resources, and digital collections available to the public without a subscription.
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Rutgers University LibrariesRutger Library has assembled an array on online databases that are available for use without subscription or institutional affiliation. They have also gone one step further and categorized them by subject area.
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Texas State Library and Archives CommissionIncludes a wealth of information including information about Texas, Texas Treasures (images of artifacts and documents), resources for librarians, catalogs and indexes.
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Google ScholarSearches scholarly literature across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites.
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Directory of Open Access Journals (DOAJ)Provides a directory to free, full-text, quality-controlled scientific and scholarly journals published on the Internet in a variety of academic subjects. All journals included use a funding model that does not charge readers or their institutions for access. DOAJ is hosted by the Lund University (Sweden) Libraries; funded by the Open Society Institute--Budapest (Hungary); and also supported by SPARC (Scholarly Publishing and Academic Resources Coalition).
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HighWire PressDigital journals, books, reference works, and proceedings. The majority of the content is focused on the sciences. Not all of the publications are freely available; some have a 1 year embargo.
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JSTOR (Open Content)JSTOR has partnered with leading presses on a project to add open access ebooks to JSTOR.
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Project Muse (Open Access)Project MUSE offers open access (OA) books and journals from several distinguished university presses and scholarly societies.
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PubMed CentralPubMed Central® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM). PMC contains more than 5 million full-text records, spanning several centuries of biomedical and life science research (late 1700s to present).
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Social Science Research Network (SSRN)SSRN is a pre-print server for economics, business, law and humanities. Many universities and research centers publish their working papers at SSRN. Uploading and searching working papers is free; a number of fee-based sources is also available. Acquired by Elsevier in 2016.
Citation Management Tools
Statistics
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data.census.gov (Explore Census Data)A tool to provide access to and manipulate data about the U.S., Puerto Rico, and the Island Areas. The data sources include several censuses and multiple surveys.
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Assistance ListingsFormerly Catalog of Federal Domestic Assistance. Government-wide compendium of Federal programs, projects, services and activities which provide assistance or benefits to the American public. It contains financial and non-financial assistance programs administered by the Federal government.
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Census of Population and Housing (1790-2010)Full Census reports in PDF & Zip files.
Also available from IPUMS (Minnesota Population Center, University of Minnesota)