The author reports that RK is a strong contender for best compresson ratios among the current crop of archivers. Another Win32 archiving program. BitZipper Another zip utility. I'm not sure about their grammar, but they have some excellent charts and photos on their page. See if you believe the hype.
Site requires free registration for purposes of tracking stored images.
JJ2000 - An Implementation of the JPEG2000 Standard in Java JJ2000 is a Java implementation of a JPEG2000 codec. The web site states that JJ2000 is under consideration to be a reference implemenation of the standard. The page also includes links to a white paper, presentations, and other related web pages. Completely free, can be used in commercial products. A comprehensive set of tests on lossless compression of images.