Here are the online links :

1. https://swayamprabha.gov.in/
2. http://storage.googleapis.com/uniquecourses/online.html
3. https://epgp.inflibnet.ac.in/
4. http://cec.nic.in/
5. https://www.youtube.com/user/cecedusat
6. https://ndl.iitkgp.ac.in/
7. https://shodhganga.inflibnet.ac.in/
8. https://ess.inflibnet.ac.in/
9. https://vidwan.inflibnet.ac.in/