Marginalia Search
search.marginalia.nu
search.marginalia.nu is a small independent do-it-yourself search engine for surprising but content-rich websites that never ask you to accept cookies or subscribe to newsletters. The goal is to bring you the sort of grass fed, free range HTML your grandma used to write.

From the site:

This is an independent DIY search engine that focuses on non-commercial content, and attempts to show you sites you perhaps weren’t aware of in favor of the sort of sites you probably already knew existed.

Where this search engine really shines is finding small, old and obscure websites about some given topic, perhaps old video games, a mystery, theology, the occult, knitting, computer science, or art.