Open source. Open possibilities.

PlainShelf is a local-first, single-user reading library designed for lightweight text content, storing data in human-readable files to ensure user privacy and data ownership.

KOReader is a versatile document viewer for e-ink readers, supporting PDF, EPUB, and many formats across devices like Kindle, Kobo, and Android, with extensive customization and plugins.

calibre is a comprehensive cross-platform e-book manager used to view, convert, edit, and catalog e-books across major formats.