Yes. I recommend Zotero as an alternative to Calibre frequently, and while reading your comment I was going to make a comparison before I even got to the part that mentions Calibre by name.
I started out using using Zotero during lockdowns after having known about it for years. The landing page and Wikipedia article never really sold me on it before—"A reference manager? Why do I want that?" Now I use it for collecting everything that isn't a good fit for the native bookmarks manager in Firefox (which is a lot more than what Chrome's bookmarks manager is good for, but still). Having started using it, it's great for other stuff like archiving Web pages and good enough to create/manage lists of books.
I still think it would be a great idea of Citadel were able to work as a Zotero add-on/distribution that was specifically designed with e-books in mind.
I started out using using Zotero during lockdowns after having known about it for years. The landing page and Wikipedia article never really sold me on it before—"A reference manager? Why do I want that?" Now I use it for collecting everything that isn't a good fit for the native bookmarks manager in Firefox (which is a lot more than what Chrome's bookmarks manager is good for, but still). Having started using it, it's great for other stuff like archiving Web pages and good enough to create/manage lists of books.
You might also be interested in a recent Show HN: Citadel – a Calibre-compatible eBook management app <https://github.com/every-day-things/citadel>
I still think it would be a great idea of Citadel were able to work as a Zotero add-on/distribution that was specifically designed with e-books in mind.