| 1 | Springer Open - Journals | https://www.springeropen.com/journals |
| 2 | Springer Open - Books | https://www.springeropen.com/Books |
| 3 | Project MUSE | https://muse.jhu.edu/search?action=oa_browse |
| 4 | IISc - ePrints | https://eprints.iisc.ac.in/index.html |
| 5 | Indian Society for Education and Environment | https://www.iseeadyar.org/ |
| 6 | NiScPR | https://nopr.niscpr.res.in/ |
| 7 | Impact Journals | http://www.impactjournals.us/index.php |
| 8 | Science Alerts | https://scialert.net/index.php |
| 9 | Directory of Open Access Books | https://doabooks.org/ |
| 10 | Directory of Open Access Journals | https://doaj.org/ |
| 11 | Rare Book Room | http://www.rarebookroom.org/ |
| 12 | Project Gutenberg | https://www.gutenberg.org/ |
| 13 | Shodhganga - ETD | https://shodhganga.inflibnet.ac.in/ |
| 14 | e-Gyankosh - NDR | https://www.egyankosh.ac.in/ |
| 15 | ePG Pathshala | https://epgp.inflibnet.ac.in/ |
| 16 | World Bank - OKR | https://openknowledge.worldbank.org/home |
| 17 | Science Direct | https://www.sciencedirect.com/#open-access |
| 18 | Zenodo ORR - managed by CERN | https://zenodo.org/ |
| 19 | J-Store | https://about.jstor.org/oa-and-free/ |
| 20 | MDPI | https://www.mdpi.com/ |
| 21 | Sage Open | https://journals.sagepub.com/home/sgo |
| 22 | Taylor and Francis - OA | https://www.tandfonline.com/ |
| 23 | Cambridge Core - Cambridge Uni. Press | https://www.cambridge.org/core/publications/open-access/listing |
