Bullshido's Comprehensive List of Links to Tactical Resources (BCLLTRFY)
I'm starting this, feel free to add your favorite ones. We'll update this post as they come in.
22,000 Military Manuals (Public Domain Torrent on TPB, may not be work safe because of ads/torrents)
CD for the 3rd World: Medical, Agricultural, Buildings... bug out/homesteading information.
Summit Gun Broker
Please add your links, especially ones that are run by fellow Bullies.