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 2.8 presents a few more features and a lot of small bug fixes. MIME types for cbz, cbr and cbt archives are now registered by default and Comix includes a thumbnailer for Nautilus (by Christoph Wolk) that creates thumbnails while browsing these files.
Read more at: http://comix.sourceforge.net