JSTOR is a digital library of academic journals, books, and primary sources.

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A privacy respecting meta search engine.

Google Scholar provides a simple way to broadly search for scholarly literature. Search across a wide variety of disciplines and sources: articles, theses, books, abstracts and court opinions.

DOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community, committed to ensuring quality content is freely available online for everyone.

ERIC is an online library of education research and information, sponsored by the Institute of Education Sciences (IES) of the U.S. Department of Education.

Search for LibGuides content and librarian authors, and find great examples of guides from our worldwide user community.

Millions of books online

Copyscape is a free plagiarism checker. The software lets you detect duplicate content and check if your text is original.

(Bielefeld Academic Search Engine) More than 340 mio. scientific documents from more than 11.000 content providers. BASE is one of the world's most voluminous search engines for academic web resources.

Academia.edu is a place to share and follow research.