1. Consortium for Educational Communication

2. Directory of Open Access Repositories

3. eGyanKosh (IGNOU)

4. Library of Congress

5. National Digital Library of India

6. National Science Digital Library (NSDL)

7. NISCAIR Online Periodicals Repository

8. NPTEL provides E-learning through online Web and Video courses in Engineering, Science and humanities streams

9. Parliament Digital Library

10. The British Library

11. UNESCO Library

12. Virtual Library

13. World Digital Library