Open Access Library (OALib): Open Access Library is an academic search engine and publisher. You can download research papers for free and submit your paper to it.
Open Access Library Journal: Open Access Library Journal (OALib Journal) is an international, open access and peer-reviewed journal.
Citeseerx: CiteSeerˣ is a public search engine and digital library for scientific and academic papers, primarily in the fields of computer and information science
Google Scholar: 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
Research4Life: Research4Life is designed to enhance the scholarship, teaching, research and policy-making of the many thousands of students, faculty, scientists, and medical
- DOAJ: is an online directory that indexes and provides access to quality open access, peer-reviewed journals.
- Bookboon : provides 1000+ free eBooks. You can download textbooks and business books in PDF format without registration.
- Google Books: Google Books is a service from Google Inc. that searches the full text of books and magazines that Google has scanned.
- PDFDrive: Download free eBooks in PDF format.
- Gutenberg: Project Gutenberg is a volunteer effort to digitize and archive cultural works, to “encourage the creation and distribution of eBooks”. It was founded in 1971 by American writer Michael S. Hart and is the oldest digital library.
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