Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines.

MIT OpenCourseWare (MIT OCW) is an initiative of the Massachusetts Institute of Technology (MIT) to put all of the educational materials from its undergraduate – and graduate-level courses online, freely and openly available to anyone, anywhere.

TheFreeLibrary.com is a free reference website that offers full-text versions of classic literary works by hundreds of authors.

The Internet Public Library (IPL, ipl2) was a non-profit, largely student-run website managed by a consortium, headed by Drexel University.

The Online Books Page is an index of e-text books available on the Internet. It is edited by John Mark Ockerbloom and is hosted by the library of the University of Pennsylvania.

TheFreeDictionary.com is an American online dictionary and encyclopedia that gathers information from a variety of sources.

JURN is a unique search tool which helps you find free academic articles and books. JURN harnesses all the power of Google, but focusses your search through a hand-crafted and curated index.

Oxford University Press (OUP) publishes the highest quality journals and delivers this research to the widest possible audience.

Academic Journals is a broad-based publisher of peer-reviewed open access journals.

The Directory of Open Access Journals was launched in 2003 at Lund University, Sweden, with 300 open access journals and today contains ca.

OMICS International (and its subsidiaries), is an Open Access publisher and international conference Organizer

SAGE is the world’s 5th largest journals publisher.

SpringerOpen, launched in June 2010, includes Springer’s portfolio of 200+ peer-reviewed fully open access journals across all areas of science.

Scientific Research Publishing (SCIRP) is an academic publisher of open access journals.

OMICS International (and its subsidiaries), is an Open Access publisher and international conference Organizer

PubMed Central® (PMC) is a free full-text archive of biomedical and life sciences journal literature at the U.S.

e-journals are scholarly journals or intellectual magazines that can be accessed via electronic transmission.

InTechOpen is the world’s largest Science, Technology and Medicine Open Access book publisher.

Z Library is an online platform that provides Free ebooks since 2009. With over 3,430,839 books and around 73,759,848 articles, this is one of the largest ebook library on the internet.

JSTOR (short for Journal Storage) is a digital library founded in 1995. Originally containing digitized back issues of academic journals, it now also includes books and primary sources, and current issues of journals.

AGORA is the acronym for the Access to Global Online Research on Agriculture program.

HINARI Access to Research in Health Programme was set up by the World Health Organization and major publishers to enable developing countries to access collections of biomedical and health literature.

Online Access to Research in the Environment (OARE) is led by the United Nations Environment Programme (UNEP) in partnership with major publishers.

The Access to Research for Development and Innovation (ARDI) program is coordinated by WIPO together with its partners in the publishing industry with the aim to increase the availability of scientific and technical information in developing countries.

Research4Life is the collective name for 4 programs – HINARI (focusing on health), AGORA (focusing on agriculture), OARE (focusing on environment), and ARDI (focusing on applied science and technology)

African Journals OnLine (AJOL) is a non-profit organisation dedicated to improving the online visibility of and access to the published scholarly research of African-based academics.

RSC Advances is an online-only peer-reviewed scientific journal covering research on all aspects of the chemical sciences.

EBSCO offers library resources to customers in academic, medical, K–12, public library, law, corporate, and government markets.

TEEAL is The Essential Electronic Agricultural Library.

ProQuest is committed to empowering researchers and librarians around the world.

BMC has an evolving portfolio of some 300 peer-reviewed journals, sharing discoveries from research communities in science, technology, engineering and medicine.

POPLINE contains the world’s most comprehensive collection of population, family planning and related reproductive health and development literature.

The Education Resources Information Center (ERIC) is an online digital library of education research and information.

Questia is an online commercial digital library of books and articles that has an academic orientation, with a particular emphasis on books and journal articles in the humanities and social sciences.

Bringing together 2 million digitized entries across Oxford University Press’s Dictionaries, Companions and Encyclopedias, Oxford Reference is the premier online reference product, spanning 25 different subject areas.

Science Daily is an American website that publishes press releases and churnalism about science. ScienceDaily is one of the Internet’s most popular science news web sites.

ScienceDirect is Elsevier’s leading information solution for researchers, Elsevier’s leading platform of peer-reviewed scholarly literature.

Emerald Publishing was founded in 1967 to champion new ideas that would advance the research and practice of business and management.

The International Monetary Fund’s (IMF) eLibrary simplifies analysis and research with direct access to the IMF’s periodicals, books, working papers and studies, and data and statistical tools.

The BMJ (formerly the British Medical Journal) is an international peer reviewed medical journal and a fully online first publication.