Kiwix can do that also. You needs to specify the ZIM file and it works:

https://wiki.kiwix.org/wiki/Content_in_all_languages

Why I know that? I wanted to travel as system administrator in some antartica base with a whole copy of stackoverflow with me.

Don't forget the Arch and Gentoo wikis!

Nice, how was Antarctica?

Kiwix has Stack Overflow (and various StackExchange subsites), Project Gutenberg, TED talks, and plenty more. You can also request something.

Yes, there are Kiwix .zim files of Stack Overflow. I think Zeal also may have an SO docset.