Links out
Resource library
62 annotated links to agencies, standards bodies, nonprofits, tools and forums. Most of them go somewhere we neither own nor earn from, which is the point.
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Matching resources
- Practitioner or communityToolFree
Organic Maps (opens in a new tab)
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.
- Practitioner or communityToolFree tier
CalTopo (opens in a new tab)
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.
- Practitioner or communityToolFree
Meshtastic (opens in a new tab)
Meshtastic
Open source LoRa mesh messaging on cheap hardware, no licence needed. Range claims vary wildly with terrain, so test yours before you plan around it.
- Practitioner or communityToolFree
Winlink Global Radio Email (opens in a new tab)
Winlink
Email over radio when the internet is gone, used heavily in real disaster response. It requires a licence and some setup patience, and it is the closest thing to normal messaging without infrastructure.
- Practitioner or communityToolFree
Battery University (opens in a new tab)
Cadex Electronics
Plain explanations of how lithium, lead acid and other chemistries age, charge and fail. Read the storage-state article before you put a battery bank away for a year.
- Practitioner or communityToolPaidOurs
PrepperGPT (opens in a new tab)
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.
Know something that belongs here? Send it over. We check every link on a schedule and remove anything that goes dark. Three of these entries are our own projects and are labelled as such.