CBViewer is a comic book viewer for comic book archives in cbz, cbr, zip, and rar formats. The interface is written in java but it requires unrar for linux or windows depending which OS you are running on. It will do zip files in java.
cbviewer is small and works nicely
It's really sloooooow! And it couldn't open my Grimm Fairy Tales comic (that has about 14 Mb)
very good project