Hi Helf!
Have you looked through this sticky thread?
https://www.mobileread.com/forums/showthread.php?t=76122
Some of the info is old, but you might find some gems.
I know Obsessed lists the apps he likes in his Resources for New Users (sticky) thread. Might be more gems in there.
Good luck!
Hey Vit -- thanks for the list! You have some interesting looking apps, and quite a few I can't read!