calibre is described as 'Free e-book manager offering library management, multi-format conversion, syncing to devices, news download as e-books, built-in viewer, editor, and privacy' and is a leading Ebook Reader in the news & books category. There are more than 100 alternatives to calibre for a variety of platforms, including Windows, Android, Mac, Linux and iPhone apps. The best calibre alternative is KOReader, which is both free and Open Source. Other great apps like calibre are Readest, Foliate, Librera Reader and Koodo Reader.
Tool for extracting original source files (images, PDFs, etc) from MOBI and AZW ebooks. A Calibre plugin is also available. Does not work on DRM'd files, but will work on files that have been deDRMed.
Application allows you easily converts djvu, epub, fb2, lit, azw, lrf and other eBook files to txt, pdf, pdb, rtf and other formats.
PDF 2 Epub is a free online file conversion service which allows you to create Epub ebooks out of PDF documents. It works for both, PDFs with editable content and scanned PDFs which do not contain any text information.
eBook reader and library manager designed for macOS and iOS supporting EPUB, PDF, MOBI, AZW, AZW3, KEPUB, and CBZ formats, customizable fonts and themes, privacy-focused local or iCloud data, automatic sync, and 100,000+ free public domain books.
Stanzetta is a powerful reader of books in the epub format for smartphones running the 7.5 version of the Windows Phone OS .
WizRead combines a powerful reading app with an exciting community, letting you organize, track and share your entire reading journey in one seamless experience.
Browse your library by: directory, cover, favorite, date opened. Download free or paying books from online libraries (in the opds format) and have access to thousand of publications Create bookmarks, zoom, search....
Books is a simple application to access and organize your e-books on GNOME. It is meant to be a simple and elegant replacement for using a file manager to deal with e-books. It's included in the default set of core applications since GNOME 3.16.
With the Latest Reader Library You Can… Shop thousands of eBook titles including New York Times Bestsellers. Read eBooks on your PC or Mac with adjustable text and two-page view. Search inside your collection of eBooks. Borrow books from your library (library card required). Auto.
Mini Reader is the "anti-modern" e-book app. It stands out by stripping away the clutter found in typical readers to focus on pure utility:
A next-generation iOS viewer app for self-scanned manga and books with AI-powered organization, cloud storage support, and NAS streaming.
Germany
EU
Japan