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.
The 2.x branch of Comix is now marked as stable since no bug reports concerning the stability of Comix has been files since the release of 2.0b. There are some minor cosmetic differences in this version, apart from that the only change from 2.0b is that the text in the comments now is selectable.
More information can be found at http://comix.sourceforge.net/