Calibre Web - Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks...
CDisplay Ex - CDisplay Ex is the most used comic book reader.
Komga - Media server for comics/mangas/BDs with API and OPDS support.
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
calibre - Ebook manager, viewer & converter
Tachiyomi - A free and open source manga reader for Android.