1.  NCERT Textbooks for Classes I-XII

2. E-Pathshala NCERT

3. Skill Education - Books and Support Material

4. CBSE Question Bank - Class X

5. CBSE Question Bank - Class XII

6. Additional Practice Questions for Class X and XII

7. DATA ON CYBER CONGRESS

8. Punjabi E-Library

9. Leisure time reading (English)

10. Psychology Class XII

11. Oswal Books (Free Resources)

12. DAV Board Previous Years Papers for Class VIII

13. DAV Board Previous Years Papers for Class XI

e-Content Portals

DIKSHA

https://www.cbse.gov.in/cbsenew/e-resources.html

National Digital Library of India

https://ndl.iitkgp.ac.in/

Vidya Mitra

https://vidyamitra.inflibnet.ac.in/

E-Books

NCERT Textbooks

https://ncert.nic.in/textbook.php

Project Gutenberg

https://www.gutenberg.org/

Rare Book Society of India

https://www.rarebooksocietyofindia.org/

Internet Archive – Open Library

https://openlibrary.org/

e-Books.com

https://www.ebooks.com/en-us/free

Rashtriya e-Pustakalaya 

https://ndl.education.gov.in/home

3D Models

Sketchfab

https://sketchfab.com/search?type=models

Virtual Anatomy Museum 

https://anatomymuseum.kk.usm.my/index.php/virtual-museum

Open Course Ware

MIT Open Courses

https://ocw.mit.edu/

NPTEL

https://nptel.ac.in/

For free e-books, here are some popular sites where you can download or read them online:

1. *Project Gutenberg*: [gutenberg.org](https://www.gutenberg.org/)

   - Offers over 60,000 free eBooks, including many classic literature titles.

2. *Open Library*: [openlibrary.org](https://openlibrary.org/)

   - An initiative of the Internet Archive, offering millions of books in digital format.

3. *ManyBooks*: [manybooks.net](https://manybooks.net/)

   - Provides access to thousands of free eBooks across various genres.

4. *Google Books*: [books.google.com](https://books.google.com/)

   - Search for "free eBooks" to find a wide range of public domain books.

5. *LibriVox (for audiobooks)*: [librivox.org](https://librivox.org/)

   - Offers free public domain audiobooks read by volunteers.

These platforms have a wide selection of books, including classics, fiction, non-fiction, and more.