Mastodon certainly has a lot of creative, unique apps. You can certainly find a fit just for you.
But I think the #Threadiverse is having it's own golden era right now with a plethora of choices for us finicky #Fediverse users. The best list I could find for #Lemmy is attached, but it's still missing a few newcomers, like @bean
Nothing near as comprehensive for #kbin yet (the API is still getting it's legs) but there is the amazing @ArtemisApp
https://github.com/dbeley/awesome-lemmy
@maegul @db0 @fediverse
The most promising project in terms of plugins is Bonfire (they call them extensions)
Forkeys have a plugin system already. I’ve built a few things with it, but usage isn’t widespread, at least outside of Misskey. I wrote a bit about it and created some documentation. (Maegul your name is super familiar, apologies if you already knew about this)
https://box464.com/posts/firefish-plugins-conclusion/