2600

http://www.2600.com/

 

astalavista.box.sk

http://astalavista.box.sk/

 

Attrition.org

http://www.attrition.org/

 

Chaos Computer Club

http://www.ccc.de/

 

Cult of the Dead Cow

http://www.cultdeadcow.com/

 

ElfQrin's Hacking Lab

http://www.elfqrin.com/hacklab/index.php

 

Fravia

http://fravia.anticrack.de/

 

Hacker3r.com

http://www.hack3r.com/

 

Hacker Network

http://www.hackernetwork.com/

 

L0pht Heavy Industries

http://www.l0pht.com/

or http://www.atstake.com/research/redirect.html (library)

or http://www.atstake.com/research/tools/ (software)

 

MegaSecurity.org

http://www.megasecurity.org/Main.html

 

neworder.box.sk

http://www.neworder.box.sk/

 

WhiteHat.org

http://www.whitehat.org/