Which zip library should I use?

[carlwryker]

Which zip library should I use? There are so many choices.

I need to create new zip archives and open existing ones.
I need to create new files in the zip archive.
I need to append to existing files in the zip archive.
I need to overwrite existing files in the zip archive.
I need to remove files from the zip archive.
It should be able to work on Windows, Linux, and Mac.
It must be free to use in commercial projects.

[helios]

zlib does not handle ZIP (PKZIP) files. It only implements DEFLATE and the gzip container.

There are actually not that many choices. To my knowledge, there's like two or three. Take a look at libarchive.
http://www.libarchive.org/

[carlwryker]

Thank you!