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.
A few bugs have been fixed in version 2.4.1, among them one that could cause Comix to crash when starting the program with a certain preference set.
Read more at http://comix.sourceforge.net