The Offspot is an offline wifi hotspot in development, hopefully ready to be sold soon.
Easily powered by most USB ports, it holds a considerable amount of useful (or not) data for you to use when you're offline, whether intentionally or otherwise. Can be battery powered with a 18650 USB battery bank.
(Preliminary) traits below.
Price: $250 USD in cryptocurrency, fiat (Ebay), or just build your own.
Availablility: Sooner than later.
- Raspberry Pi 2 B
- 8GB microSD for OS.
- USB microSD/SD card reader.
- 256GB microSD in SD adapter (set to read-only) for data.
- Project Gutenberg
- Some Stack Overflows
- Arch Linux Wiki
- FreeBSD 12.1
- And probably more.
Alternatives / similar ideas
It's not ready yet, but email or Jabber sega01 at go-beyond dot org.