https://github.com/janeczku/calibre-web https://github.com/janeczku/calibre-web It doesn't do all that calibre does obviously but it does most of what I need.

https://github.com/janeczku/calibre-web https://github.com/janeczku/calibre-web It doesn't do all that calibre does obviously but it does most of what I need. It's not per see a fork as it only uses the same database formats and directly call calibre for conversion but it's as close as you get to a "modern" gui on top of calibre. As usual, the people actually doing the work and the people complaining are strictly different subsets.