RadicalSqueeze is an archiving and compression program for Zip archives that allows the user to modify the contents of existing Zip files or to create new ones. From Radical Breeze's [website][1] (via Wayback Machine):

> Want to email some files to a friend? Looking to backup your
> important files? Or maybe you need to upload some files to a server
> and you need to make the transfer go a little (or a lot) quicker.
>
> RadicalSqueeze includes the ability to edit the contents of an
> already created Zip file in addition to creating one from scratch.
>
> There are many reasons you may need to compress your files. And
> RadicalSqueeze is an incredibly simple way to do it!

DL #1: v2.1.1 (2006)
DL #2: v2.0.1 Demo (2005)
DL #3: v1.1.0 (2004)

Compatibility
Architecture: PPC (Carbonized)

Mac OS X 10.2.8 or higher (including 10.3).

Tested to work in Mac OS X 10.6.8 Snow Leopard.

  [1]: http://macintoshgarden.org/