Jomic is a viewer for comic book archives. It can handle both CBZ and CBR archives and has a two page mode. Supported image formats are PNG, JFIF/JPEG, TIFF, and GIF. It is Open Source software distributed under the GNU General Public License.
You need Java 1.4 (or later), Java Advanced Imaging and the unrar command (version 3.20 or later).
Download: Jomic 0.9.29 Mac OS X,Windows, Linux, Other