GitHub - FolioReader/FolioReaderKit: 馃摎 A Swift ePub reader and parser framework for iOS.
GitHub - wustho/epr: CLI Epub Reader
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
GitHub - wustho/baca: TUI Ebook Reader
GitHub - caesiumstudio/csBooks-updates: csBooks is the best epub reader, pdf reader, mobi book reader and djvu reader for windows, linux and mac os. It solves your problems if you need ebook manager,