I, Librarian - open-source version of a PDF managing SaaS.
I've seen I, Librarian (https://i-librarian.net/) but am not sure how good it is.
:books: Web app for browsing, reading and downloading eBooks stored in a Calibre database
https://github.com/janeczku/calibre-web is a separated project that has that nice UI.
Collect and Analyze Billions of Data Points in Real Time. Manage all types of time series data in a single, purpose-built database. Run at any scale in any environment in the cloud, on-premises, or at the edge.
The official source code repository for the calibre ebook manager
Just beware https://calibre-ebook.com/ offers it's own web ui, only for visualizing (I think)
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