BOOKSEE.ORG – more than 2 million books in Russian – both specialized literature and fiction.
http://bookzz.org/ - the world's largest e-book library in English - both specialised literature and fiction.
Google Scholar - a wide range of academic literature. You can search in many disciplines and resources: reviewed articles, scientific papers, books, summaries and articles, from academic publishers, professional associations, draft archives, universities and other academic organizations. Google Scholar helps identifying the most relevant study from the world of academic research.
GOOGLE BOOK SEARCH (in English) offers the possibility to search and read full texts and fragments of books. It is possible to read online and download fiction, specialized literature (politics, public relations, tourism, etc.), reference books, scientific publications, textbooks, children's books, medical, pedagogical and other literature in English.
Directory of Open Access Journals (English) -2600+ free full-text quality scientific journals, of which 803 journals are searchable at the article level. Thematic coverage: Agriculture and Nutrition, Arts and Architecture, Biology and Life Sciences, Business and Economics, Chemistry, Earth and Environmental Sciences, Health Sciences, History and Archaeology, Languages and Literature, Legal and Political Science, Mathematics and Statistics, Philosophy and Religion, Physics and Astronomy, Science, Social Sciences, Technology and Engineering.
Bielefeld Academic Search Engine BASE is a multi-disciplinary academic information resource search engine developed by the University of Bielefeld. BASE contains more than 20 million information resources in different languages from around 1400 organizations in different countries.
A search engine in engineering, mathematics and computer science. TechXtra searches for information - articles, books, web addresses, industry news, dissertations and theses, study materials, etc. from more than 50 publishers and suppliers.
More open-access resources and search engines can be found on VIA Library blog