Personally, I use https://github.com/kagisearch/smallweb/ to feed my search engine / crawler. It contains 30k + rss/atom feeds of indie web sites. Thx for sharing this and the other directories.

Oh cool, you have your own search engine & crawler? I don't suppose you've written / blogged about it anywhere?

(I have my own search engine too, but still haven't blogged about it. One day.)