European Studies

A not-for-profit service delivered by The Open University and Jisc, they claim to be the world’s largest collection of open access research papers.

Over 1000 academic books that are published as open access.

Covers all areas of science, technology, medicine, social sciences, arts and humanities.

Short for Journal Storage, this is a digital library that encompasses books and other primary sources as well as current issues of journals in the humanities and social sciences. It provides full-text searches of almost 2,000 journals.As of 2013, more than 8,000 institutions in more than 160 countries had access to JSTOR. Most access is by subscription but some of the site is public domain, and open access content is available free of charge.

Funded by the German Federal Ministry of Education and Research, content is available both in German and in English.

An open access academic book publisher based in the United Kingdom. It is a non-profit social enterprise and community interest company that promotes open access for full academic monographs, critical editions and textbooks in the Humanities, Social Sciences, Mathematics and Science.

It is a free database with records for more than 1.2 million electronic theses and dissertations from around the world.