Are there some tools for zip files merging?

Question

Are there some tools for zip files merging?

I have a some versions of the same jar file and I would like to do comparison/merging between them.

Answer 1

I noticed this Comparing two .jar files already have some great options. (thanks for the great answer @aponomarenko)

For this kind of work, I usually unpack them and use Meld (Linux) and WinMerge.