Mihon which is a fork of tachyiomy (they took a dmca). Best app for mangas and webtoons.

I’m searching for one with multiple users and ldap, but that doesn’t seem to exist

Well it doesn’t support browsing its library by folder, which is a no-go for me. I use gonic.

Furthermore they use Greenpeace Energy (a renewable energy company) in order to keep alive their mail servers, which is one more reason that differentiates them from the others :). This is what keeps me from going elsewhere yet again.