Hundreds of Open Access Ebooks covering a variety of subject areas.

African Journals OnLine (AJOL) is the world's largest and preeminent platform of African-published scholarly journals. AJOL is a Non-Profit Organisation that (since 1998) works to increase global & continental online access, awareness, quality & use of African-published, peer-reviewed research. Millions of monthly downloads by site users from nearly every country in the world are an indication of the need and widespread use of the AJOL initiative. More than half of the repeat users are from Africa.

The Bielefeld Academic Search Engine (BASE) is operated by the Bielefeld University Library in Germany, and it offers more than 240 million documents from more than 8,000 sources. Sixty percent of its content is OA, and you can filter your search accordingly.

BASE has rigorous inclusion requirements for content providers regarding quality and relevance, and they maintain a list of content providers for the sake of transparency, which can be easily found on their website. BASE has a fairly elegant interface. Search results can be organized by author, title, or date.

From the search results, items can be selected and exported, added to favorites, emailed, and searched in Google Scholar. There are basic and advanced search features, with the advanced search offering numerous options for refining search criteria. There is also a feature on the website that saves recent searches without additional steps from the user.

Leading publisher of open access scientific content with nearly 400 scholarly journals across all major disciplines. Discover our open access portfolio. De Gruyter is home to around 100 fully open access journals across STEM and HSS disciplines.

DOAB is a community-driven discovery service that indexes and provides access to scholarly, peer-reviewed open access books and helps users to find trusted open access book publishers. All DOAB services are free of charge and all data is freely available.

DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.

The platform provides access to UN-produced materials in digital format free of charge. At the same time it is a major service for the long-term preservation of the Organization’s collective memory incorporating the latest relevant international standards. It is built on open source technology developed by the European Organization for Nuclear Research (CERN).

Open access collection of outstanding out-of-print books in the humanities available as free e-books courtesy of The Humanities Open Book project. Once in a title you can download in EPUB or Mobi format.

The IDF e-library showcases the variety of resources that IDF has available for health professionals, researchers, policy makers, advocates and people living with or affected by diabetes. All publications are available for download and a selection of resources can be purchased.

Library Genesis (Libgen) is a file-sharing based library website for scholarly journal articles, academic and general-interest books, images, comics, and magazines. Libgen describes itself as a "links aggregator" providing a searchable database of items "collected from publicly available public Internet resources" as well as uploaded "from users"

The Knowledge Management Portal is an online resource that integrates health and health-related information from the Ministry of Health and beyond to provide a single point of access to valuable information that facilitates evidence-based decision-making. It is a pool of knowledge resources used by policymakers, researchers, managers, planners and anybody whose aim is to accumulate more knowledge and use it to create a gratifying healthy environment. The portal provides data for evidence-based decision making to improve the quality of health care for the people of Uganda. It also supports the design of effective health worker processes for the Ministry, local government, NGOs and other private sector, organizations, health educators, and remote health workers.

PDF Drive is your search engine for PDF files. As of today,  PDF Drive has 86,082,494 eBooks for you to download for free. No annoying ads, no download limits, enjoy it and don't forget to bookmark and share the love!

Choose among free epub and Kindle eBooks, download them or read them online. You will find the world’s great literature here, with focus on older works for which U.S. copyright has expired. Thousands of volunteers digitized and diligently proofread the eBooks, for you to enjoy.

The ScienceGate goal is to support all scientific and educational communities to facilitate achieving their goals through the best path. The ScienceGate team tries to make this possible by providing and developing several unique services gathered in a web platform.

Functioning as a research and publishing network, ScienceOpen offers OA to more than 74 million articles in all areas of science. Although you do need to register to view the full text of articles, registration is free. The advanced search function is highly detailed, allowing you to find exactly the research you're looking for.

The Berlin- and Boston-based company was founded in 2013 to "facilitate open and public communications between academics and to allow ideas to be judged on their merit, regardless of where they come from." Search results can be exported for easy integration with reference management systems.

You can also bookmark articles for later research. There are extensive networking options, including your Science Open profile, a forum for interacting with other researchers, the ability to track your usage and citations, and an interactive bibliography. Users have the ability to review articles and provide their knowledge and insight within the community.

Collection: 74,560,631

Other Services: None

Good Source of Peer-Reviewed Articles: Yes

Advanced Search Options: Content type, source, author, journal, discipline

Zenodo, powered by the European Organization for Nuclear Research (CERN), was launched in 2013. Taking its name from Zenodotus, the first librarian of the ancient library of Alexandria, Zenodo is a tool "built and developed by researchers, to ensure that everyone can join in open science." Zenodo accepts all research from every discipline in any file format.

However, Zenodo also curates uploads and promotes peer-reviewed material that is available through OA. A DOI is assigned to everything that is uploaded to Zenodo, making research easily findable and citable. You can sort by keyword, title, journal, and more and download OA documents directly from the site.

While there are closed access and restricted access items in the database, the vast majority of research is OA material. Search results can be filtered by access type, making it easy to view the free articles available in the database.

Collection: 2,220,000+