In the good old days, there was no full-text search for the web. It was all about directories; phonebook-like services (Yahoo being the most prolific, I assume) that categorized the web.
Indieseek.xyz continues this tradition, with a strong Indieweb flavour. But the most fun feature of the catalog is this Stumblizer, a “Stumble upon” functionality that opens a random page from the catalogue. As the warning text says: rabbit holes galore; but there’s so much quirkiness and creativity out there. These are the sites you won’t find from the “Trending” sidebar on Twitter.