1.Google Books

A database of published books that have been scanned by Google and made available in Google search results or from the Google Book site. Most of the available books can only be read online.Link:

2.Google Scholar

Google Scholar provides a simple way to broadly search for scholarly literature across many disciplines and sources such as: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities, etc.
Link: https://scholar.google.com/.

3. Academic Journals

Academic Journals accelerates the dissemination of knowledge through the publication of high quality research articles using the open access model.
Link: http://academicjournals.org/

4. Zain Books

Zain Books provides lecture notes and free books on business marketing management and computer science engineering.
Link: http://www.zainbooks.com/.

5. BC OpenEnd Textbook

An open textbook is a textbook licensed under an open copyright license and made available online to be freely used by students, teachers, and members of the public. They are available for free as online.
Link: https://open.bccampus.ca/find-open-textbooks/


The OAPEN Library contains freely accessible academic books, mainly in the area of humanities and social sciences. OAPEN works with publishers to build a quality controlled collection of open access books
Link: http://www.oapen.org/home?brand=oapen

7. PDF Drive

PDF Drive is your search engine for PDF files. The database has about 48,173,857 eBooks that are downloaded for free. No annoying ads, no download limits, enjoy!
Link: https://www.pdfdrive.com/

8. Emerald Insight

It was founded in 1967 to champion new ideas that would advance the research and practice of business and management. Emerald continues to nurture fresh thinking in applied fields including health and social care, education, business and engineering.
Link: https://www.emeraldinsight.com/

9. Palgrave Macmillan Journals

Palgrave portfolio includes 50+ journals, with core areas in Business, Economics, Operations Research, Politics, and Sociology.
Link: https://www.palgrave.com/gp/journals

1o. Project MUSE Journals

Project MUSE, a non-profit collaboration between libraries and publishers, is an online database of peer-reviewed academic journals and electronic books. Project MUSE provides access to digital humanities and social science content from over 250 university presses and scholarly societies around the world.
Link: http://muse.jhu.edu/

11. IMF eLibrary

The IMF eLibrary simplifies analysis and research with direct access to the IMF’s periodicals, books, working papers and studies, and data and statistical tools. You will find information and perspective on macroeconomics, globalization, development, trade and aid, technical assistance, demographics, emerging markets, policy advice, poverty reduction, and so much more.
Link: https://www.elibrary.imf.org/

12. ARDI

The Access to Research for Development and Innovation (ARDI) program aims at increasing the availability of scientific and technical information in developing countries by providing access to scholarly literature from diverse fields of science and technology
Link: http://www.wipo.int/ardi/en/

13. Book Boon eBooks

There are over a thousand titles – completely free and can easily be downloaded in PDF format. They are all written exclusively for Bookboon by professors from the world’s top universities.
Link: https://bookboon.com/

14. World Bank E-Library

The World Bank is the largest single source of development knowledge. It’s Open Knowledge Repository is the World Bank’s official open access repository for its research outputs and knowledge products.
Link: https://openknowledge.worldbank.org/

15. Wiley Open Access

Open access articles are freely available to read, download and share.
Link: https://authorservices.wiley.com/author-resources/Journal-Authors/open-access/index.html

16. BookFI

Bookfi  is one of the most popular Multi-lingual online libraries in the world. It has more than 2230000 books. It’s a non-profit project and exists due your support. This project is completely free with uninterrupted access to literature.
Link: http://en.bookfi.net/