Docuwiki (not to be confused with DokuWiki) is still the most thorough source I've seen for niche documentaries.
https://docuwiki.net/index.php?title=Category:Name
It is all ed2k links. Unfortunately modern clients for ed2k are quite lacking
And yet it doesn't work without JS (I think it's because cloudflare WAF, but still)
ed2k, nice! That reminds me of this superb piece of software: MLDonkey (https://github.com/ygrek/mldonkey), written in OCaml.