Blacksecurity is a programming / hacking & security web site. users can post messages and chat with other members. Contains War Games and hacking resources.

Discussion forums with tutorials, Hacking programs and miscellanious threads.

Hacking and Security forum for advanced hackers.

Discussion forum for topics surrounding the underground, technology and the like.

Discussion forum for Southern California security experts and hackers.

Generalized Computer Security message board

Large Macintosh security and underground topic discussion forum.

A Web Board with various topics of discussion.

One of the worlds longest established hacking forums, offering resources covering everything from cracking to phreaking.

Many topics and threads about Vulnerabilities, Hacking, Phreaking, and programming. Informative and active.

Discussion forum about the insecurity of humans known as social engineering.

Forum dedicated to bringing knowledge to people starting out in hacking.

Security and Development Forum with a Security Basics Forum and Vuln-Dev.

Forums of the four largest mac hacking sites. Your ultimate connection to the macintosh underground world.

An underground hacking and security team with forums.

Forum dedicated to hacking, cracking, phreaking and other issues.