GitHub - janeczku/calibre-web: :books: Web app for browsing, reading and downloading eBooks stored in a Calibre database
GitHub - foobnix/LibreraReader: Book Reader for Android
GitHub - koreader/koreader: An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices