Maintained by user offizierkoma of Reddit's /r/stalker subreddit. Credit goes all to him. The Reddit thread in question: https://www.reddit.com/r/stalker/comments/3d5j8z/found_a_mod_repo_for_soc_only/

The links to the repositories:

Shadow of Chernobyl https://mega.co.nz/#F!R5tnxQab!u1LS76bEVBuIrAZw6Py_3A

Clear Sky https://mega.co.nz/#F!NoVzUJLZ!g4Qdy88rL3BG7WTlNXsGOw

Call of Pripyat https://mega.co.nz/#F!58lwDISQ!P-UNABvTEA7km2fLUIAU7A

offizierkoma's repository of mod tools + downgrade patches https://mega.co.nz/#F!Bh52yR5Y!-4IULj6Jg2V1mN-UKBgzoA

EDIT: I hope this thread be sticky'd, links are very much active.

This is really good.

This was a very helpful link for me. The mod scene isn't as complicated as Morrowind, but it's enough to sometimes put me off of the game. There's no authoritative central guide or repository anywhere! Since I'm doing a first run of SoC, I grabbed the Starter Pack 2015 from one of the links.

Thanks very much for this!