Please write a single answer per comment to clearly see the most popular tools. Vote on the ones you like.
There were too many options in this post and I want to see what are the really interesting ones.
To complement this post:
What file-sharing and media organizing software do you wish that existed?
LazyLibrarian for following authors and grabbing metadata for digital reading needs.
Am I the only one that has never gotten this software to work worth a damn? The interface is impenetrable and it never finds what I want.
Maybe it’s because I’m not searching for Steven King or whatever super-popular author? Either way, I’ve yet to find anything that is as easy as just going to library genesis and downloading manually.