Apps similar to calibre include Readest, which is open source with a free version. Other options are KOReader, Koodo Reader, Librera Reader and Foliate. Ebook Readers like calibre are a crowded field, with more than 100 alternatives for Windows, Android, Mac, Linux and iPhone.
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.
Japan
Leto is a simple and beautiful book management app that helps you to easily keep track of the books you are currently reading, would like to read or already have.
Homebranch is a self-hosted web application for managing and reading your E-Book collection. It provides a user-friendly interface to organize, search, and read your ebooks across devices.
Free reading platform with 6M+ books & 30K+ human-narrated audiobooks with word-level text-audio synchronization. No subscription or sign-up required.
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Instantly convert text documents and ebooks to EPUB format with this free online EPUB converter.
"Scriba eBook Maker" is a project for building ebooks (in ePub, PDF and zip formats) using contents already available in other formats (e.g., HTML, PDF, XML, etc.) both on the Web and on file systems.
Program is designed for reading fiction books. You can read books in any of the following formats: fb2/fbz, fb3, mobi/prc/azw/azw3 (No DRM), epub (No DRM), doc/rtf/docx/odt, html, txt, odt formats (and you can open zip files with books).
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