Based on our record, Ubooquity seems to be a lot more popular than Sumatra PDF. While we know about 26 links to Ubooquity, we've tracked only 1 mention of Sumatra PDF. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Maybe have a look at Kavita or Ubooquity (possibly Komga, but that's more for comics) https://www.kavitareader.com/ https://vaemendis.net/ubooquity/ https://komga.org/. - Source: Hacker News / 6 months ago
Another option might be Ubooquity – it’s simpler than Komga, but you can start it as a desktop application on your regular computer. Could be a good way to get your feet wet :). Source: about 1 year ago
I use Ubooquity to host my books and KyBook 3 to read from the OPDS feed. Source: about 1 year ago
I Use httrack.com software to download my websites. I am aware of the following software: Ubooquity, TrueNas, Kavita, Plex, MediaMonkey, Jellyfin and MusicBrainzPicard. Source: over 1 year ago
Ubooquity - Good for comics, manga, and ebooks. The interface is a little bit clunkier to manage but once it is setup it is stable. Source: over 1 year ago
You can use your browser for both, there are extensions(FireFox - PDF & EPUB/Chrome - PDF& EPUB) for that. In case, you want you use a separate software for them, I suggest SumatraPDF--it handles both PDFs and .EPUB files. Source: over 1 year ago
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calibre - Ebook manager, viewer & converter
Okular - Okular is a universal document viewer based developed by KDE.