Description:

Zipper is a tool for inspecting the contents of a compressed archive
and for extracting.

I know that there's a GNUstep port of the famous OpenUp application
but I must admit that for a living I have to use Windoze at work.
After a while I got quite used to Winzip's UI. Although I don't like
some of its features, what I really like is the content listing of an
archive without actually having to unpack it. This is what Zipper
currently tries to mimic. This has also the advantage that you don't
have to unpack archives from networked volumes to your local disk just
to view what's in it.