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.
Version 3.0 is finally ready. It includes quite a few changes, the biggest one is the cleanup of the entire codebase, but there are also some changes to the functionality of the program. A completely redesigned properties dialog, support for recent files, an "Add to library" menu item, a new preference to set the size of the magnifying lens and an Italian translation by Raimondo Giammanco among other things.
Read more at http://comix.sourceforge.net/