I rarely pirate stuff on Mac but I’ve had this saved in my bookmarks: https://www.torrentmac.net/

More obscure stuff might not be well seeded but I haven’t found anything better.

I assumed OP is after some kind of media manager with integrated download capabilities and Zlib doesn’t have anything similar as far as I know.

• Couch Potato is pretty much dead, Radarr is the way to go.

• Back in the day Sabnzbd was considered slow and inefficient so Nzbget was usually recommended. These days both are pretty much indistinguishable performance-wise and Sabnzbd seems to get more active development.

For plain ebooks there’s a Calibre plugin that integrates Anna’s Archive as a store. Requires a paid account but works okay in my limited experience.