If you’re open to not self-hosting it, but the software still being open-source, Wallabag also has a hosted version: app.wallabag.it
I really recommend it, works great. Might consider hosting it myself somewhere in the future, but i also like that i can support the creators this way.
PocketCasts but lately more AntennaPod for Podcasts
Plex(amp) and Spotify for music