Kavita – Self-hosted digital library which supports a vast array of file formats
UI with minimalism, open source and cross-platform (Win, Lin, Mac) -- what's not to like about it?!And a great name too. Kavita means poem or poetry in Sanskrit and pretty much all Indic languages.I'm sure others will point out the pros/cons vis-a-vis Calibre reader. But each serves a different niche. This one seems particularly geared towards comics. So cannot expect all the bells and whistles of Calibre.