There's Archive::Zip. Or you can run unzip -l and capture the output. Probably best not to bother with a listing though, because it could be abused.

BTW:
http://wakachan.org/junk/archive-7z.png
http://wakachan.org/junk/archive-bz2.png
http://wakachan.org/junk/archive-gz.png
http://wakachan.org/junk/archive-lzh.png
http://wakachan.org/junk/archive-rar.png
http://wakachan.org/junk/archive-zip.png

>>14

I'll toss those in the distro, too.