Astalavista
Offers security directory and related news.
E-Forumz
Forums on hacking and cracking and general computing.
FHCF - Flying Horse Cracking Force
Some background information about the group, member list, and some cracking tutorials.
Hacking and Cracking 3k
Contains tutorials, hacking utilities, and security tools.
K's World
Provides cracking tools and information.
Neworder
Hacking, cracking and security exploits.
Reverse Engineering Team
Contains projects, papers and tools.
Serials 2000
News, discussion, information and help.
