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Refdesk - free and family-friendly web site that indexes and reviews quality, credible, and current web-based resources. DeepDyve - big archive of literary and scholarly journal articles; free five-minute full-text previews. Library of free projects - Free project resources (but no software).
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. . Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...
Open access. Open access logo, originally designed by Public Library of Science. A PhD Comics introduction to open access. Open access (OA) is a set of principles and a range of practices through which nominally copyrightable publications are delivered to readers free of access charges or other barriers. [1]
The terms "free", "subscription", and "free & subscription" will refer to the availability of the website as well as the journal articles used. Furthermore, some programs are only partly free (for example, accessing abstracts or a small number of items), whereas complete access is prohibited (login or institutional subscription required).
An open repository or open-access repository is a digital platform that holds research output and provides free, immediate and permanent access to research results for anyone to use, download and distribute. To facilitate open access such repositories must be interoperable according to the Open Archives Initiative Protocol for Metadata ...
Wikimedia Commons, or simply Commons, is a wiki-based media repository of free-to-use images, sounds, videos and other media. [1] It is a project of the Wikimedia Foundation. Files from Wikimedia Commons can be used across all of the Wikimedia projects [2] in all languages, including Wikipedia, Wikivoyage, Wikisource, Wikiquote, Wiktionary ...