Comix is an image viewer specifically designed to handle comic books. It reads ZIP, RAR and tar archives (also gzip or bzip2 compressed), as well as plain image files. It has a simple and user-friendly GUI using PyGTK.
There are a number of news in version 2.2, among them a thumbnail browser, a "smart scrolling" option for the space key, the ability to align images with the number pad and an option to automatically load the last viewed page when Comix is started.
Read more at http://comix.sourceforge.net