JURN: Search Millions of Free Academic Articles, Chapters and Theses
"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. Established in 2009 to comprehensively cover the arts and humanities, in 2014 JURN expanded in scope. JURN now also covers selected university fulltext repositories and many additional ejournals in science, biomedical, business and law. In 2015/6 JURN expanded again, adding over 600 ejournals on aspects of the natural world."