Kiwix
https://www.kiwix.org/en/
Summary
Offline Wikipedia, Gutenberg Library, TED talks, and terabytes more.
Why is this useful for offline or underserved communities?
= Wikipedia offline, etc..
Basic Info
Kiwix is an offline reader for online content like Wikipedia, Project Gutenberg, or TED Talks. It makes knowledge available to people with no or limited internet access. The software as well as the content is free to use for anyone.