Calibre

koodo-reader

Koodo-reader is a modern ebook manager and reader that allows users to organize, sync, and backup their ebook collections across multiple platforms. It is designed to provide a seamless reading experience, with features such as customizable reading settings, bookmarking, and note-taking. The software is available on Windows, macOS, Linux, Android, iOS, and Web, making it accessible to users across different devices and operating systems.

koreader

KOReader is a free, open‑source ebook reader that supports a wide range of formats, from EPUB and PDF to MOBI and DJVU. It runs natively on Android tablets, macOS computers and Linux desktops, offering a consistent reading experience across devices. Designed for avid readers and students, KOReader provides powerful annotation tools, customizable layouts, and seamless integration with cloud storage, making study and leisure reading efficient and enjoyable.

Kavita

Kavita is a fast, feature-rich reading server that allows users to set up their own server and share their reading collection with friends and family. It is designed to be a full solution for all reading needs, providing a convenient and accessible way to manage and share e-books and other digital content.