Comix is a user-friendly, customizable image viewer. It is specifically designed to handle comic books, but also serves as a generic viewer. It reads images in ZIP, RAR or tar archives (also gzip or bzip2 compressed) as well as plain image files. It is written in Python and uses GTK+ through the PyGTK bindings.
Comix now includes a comic book library where comic book archives can be browsed as covers. You can add archives to the library through a dialog or by drag and drop, and easily filter out specific comic books by typing in regular expressions. A few other changes has been made as well.
Read more at http://comix.sourceforge.net