I agree, it's very heartening. I love projects for computer *resiliency*: there's so much you can do with even just a handful of smartphones and some solar panels--indeed, quite a lot you can do with *one* smartphone and *one* solar panel--if you work to make the most of it. (Resiliency projects based on other computer tech are also great, though smartphone-based projects tend to be the most accessible and/or day-to-day useful.)

I named my prepping tag, "101uses for infrastructureless computers", after this. (I had to remove a space to fit it into Dreamwidth's 40-character limit for tags: the WordPress equivalent retains the space.) The computer-resiliency posts are mixed in with stuff on other forms of emergency preparedness and data preservation (which you might also like!): off the top of my head, a couple posts you might be particularly interested in are this one about mesh-based texting and this one about apps for dealing with no or intermittent Internet access.

(*reads over offline-focused-app post again* Huh, I've actually switched a lot of these out since then, for better-functioning and/or open-sourced equivalents. The general idea still holds, but with the details now changed from FBReader to Librera, from foobar2000 to Odyssey, from MapFactor to OSMAnd, from Google Calendar to Etar + DAVx5 (with the CalDAV server run by the abovementioned mailbox.org), from Avast + WiFiMap.io to just WiFiMap.io (which now has much more usable map downloads). (Also, while F-Droid Nearby isn't a *major* reason I've been trying to get more of my apps from F-Droid, its existence is worth noting.))

(Oh, also, Berty *is* planning to have a Tor-based option for when Internet is available but Bluetooth isn't, such as some long-distance situations.)