Ebook Reader GitHub Repositories (2026) · Open Source Tools

Readest is a modern, feature-rich ebook reader designed for avid readers offering seamless cross-platform access, powerful tools, and an intuitive interface to elevate your reading experience.

BookOrbit: Your Reading Space

A fast, native and beautiful desktop viewer & editor for markdown and code with PDF export and eBooks rendering.

LocalViewer is a fast and full-featured Android SMB/WebDAV/CBZ/RAW photo/comic/ebook viewer and video player with folder and library support.

Open-source EPUB reader and remote library client for Android, with a Kindle-inspired reading experience

The most comprehensive universal, multilingual, and monolingual dictionaries—perfect for e-readers, phones, tablets, and desktop apps. Powered by Wiktionary.

Hoshi Reader Android: Japanese EPUB reader with Yomitan lookup, Anki mining, audiobook read-along, and e-ink support.

A toolkit for ebooks, audiobooks and comics written in Swift

The official source code repository for the calibre ebook manager

Lightweight Knowledge Base and Feed Reader.

A lean, fast and endlessly customisable e-reader for e-ink devices, made of plugins.