philpaper - SERP Analysis

https://philpapers.org/

https://guides.library.illinois.edu/philosophy/philpapers

https://www.pdcnet.org/philpapersfulltext

https://philarchive.org/

https://www.libraries.rutgers.edu/databases/philpapers

https://survey2020.philpeople.org/

https://www.reddit.com/r/askphilosophy/comments/8qm6h3/where_can_i_read_philosophy_papers_for_free/