Haithi Trust Digital Library

https://www.hathitrust.org/ 

Open Source Bibliometrics: Tools and Software

https://liu.cwp.libguides.com/c.php?g=225325&p=4966525 

Open Source Data Analytics Tools

https://rigorousthemes.com/blog/best-open-source-data-analytics-tools/ 

Open Source Data Mining Tools

https://www.opensourceforu.com/2017/03/top-10-open-source-data-mining-tools/ 

Open Education: Find OER (open textbooks and more)

https://guides.lib.vt.edu/oer/opentextbooks 

DU e-Library Web Platform

https://du.refread.com/#/login 

VIDWAN: Expert Database & National Researcher's Network

https://vidwan.inflibnet.ac.in/registration 

Free Teaching Tools That Aid Classroom Learning

https://www.ispringsolutions.com/blog/free-teaching-tools 

Research Data Management

https://researchdata.berkeley.edu/tools/xsede-bridges-computing-and-storage 

OER - Open Educational Resources - Courses & Subject Guides

https://pitt.libguides.com/openeducation/biglist 

Open Culture: The best educational media on the web

https://www.openculture.com/ 

MOOC Providers

https://www.classcentral.com/providers 

Harvard Business Publishing Education [Use Official Email ID to Login]

 https://hbsp.harvard.edu/educator/

Rare Books

https://indianculture.gov.in/rarebooks