http://awoozruja5y3x2s3dsecryqk4bnaxezwxkn6e4mbo3fdkm6odw6brhid.onion/computers/ARCH_DoomsDayLinuxDistributions.php
Or having a non backdoored OS is basically a crime then you'll need to get a hold of free software somehow, and the best way to do that is to have your own stockpile on hard-drive or disk ready to go in case of emergency. I've compiled a list of Linux distributions that don't need to connect to the internet and give you away by doing so, that also have a good amount of software pre-installed so that you don't have try and find it yourself someday, and get asked by the literal internetz...