The ones mentioned in this thread all use Kiwix for off-line wikipedia, OSM for maps, Khan for educational videos. It looks like internet-in-a-box is aimed at working well on low-powered devices, whereas nomad expects beefy hardware and includes local AI. Not sure how WROLPi differs from internet-in-a-box.

Maybe it's like linux distros: all based on the same software, but optimized for different use-cases or preferences.

I mean, technically they use Kolibri for educational videos and exercises. A lot of them do come from Khan Academy, but we do a lot of work to make an offline first education platform, and also bring in a huge swathe of other open educational resources.