- NROER http://nroer.gov.in
- KOER http://www.karnatakaeducation.org.in/KOER/en/index.php/Main_Page
- DOER http://doer.metastudio.org
- OER Commons https://www.oercommons.org/
- Wiki Commons https://commons.wikimedia.org/wiki/Main_Page
- Wikipedia https://en.wikipedia.org/wiki/Main_Page