Apps similar to crqt-ng include calibre, which is free and open source. Other options are KOReader, Librera Reader, Foliate and Cool Reader . In total there are seven Ebook Readers like crqt-ng for Linux, Android, Windows, self-hosting and Mac.
Free e-book manager with features including library management, format conversion, syncing to devices, internet-independent operation, built-in viewer, news download as e-books, text-to-speech, privacy focus, extensible plugins, and no registration or tracking.
India
An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices.
Librera Reader is a highly customizable and feature-rich application for reading books in PDF, EPUB, MOBI, DjVu, FB2, TXT, RTF, AZW, AZW3, HTML, CBZ, CBR formats on Android devices.
Slovakia
EU
ItalyEU
Cool Reader is fast and small cross-platform XML/CSS based eBook reader for desktops and handheld devices. Understands a number of text document formats, suppurt OPDS (in new ui-opengl version). Fully customizable palette, text reformatting with any font size, font...
Russia
DinoReader is built on the FBReader reading engine, but includes features not currently available in the mainstream app:
United Kingdom
