1. National Digital Library of India (NDLI)

National Digital Library of India (NDLI) is a virtual repository of learning resources. It is not just a repository with search/browse facilities but also provides a host of other services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, as part of its National Mission on Education through Information and Communication Technology (NMEICT). https://ndl.iitkgp.ac.in

2. Shodhganga

Shodhganga is a comprehensive online repository of theses and dissertations submitted to various Indian universities. It is a digital platform that provides access to a vast collection of research works, aiming to preserve and disseminate scholarly knowledge. https://shodhganga.inflibnet.ac.in

3. e-PG Pathshala

This platform offers high quality curriculum based interactive e-content in 70 PG subjects across all disciplines. It provides access to digital textbooks for all classes, graded learning materials and enables participation in exhibitions, contests, festivals, workshops, etc.https://epgp.inflibnet.ac.in

4. NCHMCT: Digital Book / Journal  https://nchm.gov.in/digital-e-journal-e-book

OTHER IMPORTANT OPEN RESOURCES:

1. Directory of Open Access Journals (DOAJ)

The Directory of Open Access Journals (DOAJ) is a digital library of open-access, peer-reviewed journals. It provides a platform for scholars to publish and access scholarly content without financial, legal, or technical barriers https://doaj.org

2. Directory of Open Access Books

DOAB is a community-driven discovery service that indexes and provides access to scholarly, peer-reviewed open access books and helps users to find trusted open access book publishers. https://www.doabooks.org/

3. Project Gutenberg

Project Gutenberg is a digital library that provides over 60,000 free e-books to the public, mostly classic works from the 19th and early 20th centuries. Project Gutenberg was the first provider of free electronic books, or eBooks.https://dev.gutenberg.org/

4. Z-library 

Z-library is a free online library containing over 100 million books. Anyone can download e-books from our website without registration and in many formats. https://zlibrary.to/index

5. Open Access Thesis & Dissertations

A repository of open access theses and dissertations published around the world. OATD currently indxes 5,153,410 theses and dissertations. https://oatd.org

6. The OAPEN Foundation

OAPEN promotes and supports the transition to open access for academic books. https://www.oapen.org

7. Public Book Database

You can download books, journal articles, etc. from this Public Books Database.

https://www.publicbooks.org/public-books-database/

8. National Library Portal

National Library of India has launched an Integrated Search Portal for Open Access Educational Resources to be used by the citizens of India during lock down period. https://nationallibrary.gov.in/home/open_educational_resources#gsc.tab=0

9. Indianjournals.com

Provides a vast collection of interdisciplinary Indian journals and research publications.

http://indianjournals.com/ijor.aspx?target=open_access_publications_list

10. Online Books Page:

It lists freely accessible archives of magazines, journals, newspapers, and other periodicals.

http://digital.library.upenn.edu/books/serials.html

11. HathiTrust

A partnership of academic and research institutions, offering a collection of millions of titles digitized from libraries around the world. https://www.hathitrust.org