Yomikiru is an offline reader for already downloaded comics, manga, webtoons and epub. Supports continuous vertical scrolling mode with no gap in between images. Supports drag and drop of files.
OpenComic - Open-source comic and manga reader for the desktop.
calibre - Ebook manager, viewer & converter
YACReader - Download YACReader for your platform. Windows, Linux, MacOSX. And enjoy you comic books cbr cbz with the best comic reader.
FBReader - FBReader is an e-book reader for various platforms. Features:
CDisplay Ex - CDisplay Ex is the most used comic book reader.
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.