MuPDF might be a bit more popular than Librera Reader. We know about 20 links to it since March 2021 and only 14 links to Librera Reader. 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.
I've been rather happy with Librera, although when reading foreign languages, I prefer KOReader for its locally installed dictionary lookups (you have to add them). Note that these are both reader software, first, and not advanced library management packages (as far as I know). The last I checked, Librera also had two versions on the Play store, with the paid pro (or whatever) version sending a few dollars towards... - Source: Hacker News / 5 months ago
On Android, the text-to-speech I find is better with https://librera.mobi/. Source: 12 months ago
I use Libera which has everything I need for a reader, to view full-screen is essential bc it makes use of all the space on phone. Source: about 1 year ago
Librera reader, perhaps? https://librera.mobi/. Source: about 1 year ago
I personally use Librera on Android with google translate. Source: about 1 year ago
MuPDF mini (version 1.23.3a): Minimalist viewer for PDF, XPS, CBZ, unprotected EPUB, and FB2 documents. Source: 8 months ago
Mupdf is the mupdf of epub; it supports epub and other formats beyond pdf¹. When I've had really large files I've used mupdf to read them a few times, as it seems to be far better at handling them than other tools. ¹ https://mupdf.com/. - Source: Hacker News / 8 months ago
Doesn't exactly fit your requirements, but might as well mention it here: muPDF - the most lightweight PDF viewer that I've ever seen. You don't even have to install it. Mobile version exists by the way. Source: about 1 year ago
MuPDF viewer (version 1.21.0a): Lightweight document viewer. Source: about 1 year ago
I don't see anything about that on ArchWiki or MuPDF's website. Could you provide details on how it is obsolete and what critical vulnerabilities it has? Source: over 1 year ago
ReadEra - Read book files in EPUB, PDF, DOC, DOCX, RTF, TXT, DJVU, FB2, MOBI and CHM formats.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
FBReader - FBReader is an e-book reader for various platforms. Features:
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
calibre - Ebook manager, viewer & converter
Okular - Okular is a universal document viewer based developed by KDE.