Where we go deepest
Almost everything you know how to look up lives on someone else's server. This pillar is about the copy you keep: offline encyclopedias, maps, manuals, documents and the power to read them.
How to keep Wikipedia, maps, manuals and your own documents readable with no network, what it costs in storage, and the order to do it in.
· 5 min read · 5 sources
8 vetted links for offline knowledge, annotated so you know what each one is for before you click.
Kiwix
Reads offline copies of Wikipedia, Stack Exchange, medical references and more. The single highest-value piece of software in this whole library, and it runs on a phone.
Kiwix
The actual downloads: full Wikipedia at around 100GB, a text-only version at a fraction of that, plus WikiMed, Wikivoyage and iFixit. Start with WikiMed if storage is tight.
Project Gutenberg
Seventy thousand public domain books, downloadable in bulk. Worth having for morale as much as for reference, because a week without power is very long.
Internet Archive
Manuals, out-of-print technical books and government publications that have quietly vanished from their original sites. Search here first when a citation link dies.
OpenStreetMap Foundation
The map data behind most offline mapping apps. Free to download by region, and in rural areas it often has trails and tracks that commercial maps leave out.
Organic Maps
Offline maps and turn-by-turn routing with no account and no tracking. Download your state before you need it, which is the whole point and the step everyone forgets.
CalTopo
Serious topographic mapping with printable outputs, slope shading and fire history layers. The free tier prints a good paper map, which is the version that works with a dead phone.
PrepperGPT
An offline survival AI on a USB drive, with a local model and reference library that work with no network. One of our own projects, listed here because it belongs in this category, not because it is free.