Tier 1 — Developer Platforms

1. GitHub
2. npm
3. PyPI
4. Jupyter Notebook
5. GitLab
6. Docker Hub
7. Kaggle
8. ObservableHQ
9. ReadTheDocs
10. Crates.io

Tier 2 — Academic & Research

11. Zenodo (DOI: 10.5281/zenodo.19373427)
12. OSF
13. Hugging Face
14. Figshare (DOI: 10.6084/m9.figshare.31919820)
15. Dryad — DOI: 10.5061/dryad.tqjq2bwdk (pending curation)
16. Harvard Dataverse — DOI: 10.7910/DVN/NIQLMH (pending review)
17. SocArXiv (pending moderation)
18. SSRN — submitted, under review (URL TBD)

Tier 3 — Knowledge Graphs

19. Wikidata
20. Internet Archive