Macintosh Underground Forums Large Macintosh security and underground topic discussion forum. http://freaky.staticusers.net/ugboard/

Psyon.org A Web Board with various topics of discussion. http://community.psyon.org

WhiteBBS Board for programming and general OS security. http://whitemac.netfirms.com/cgi-bin/ib3/ikonboard.cgi

HFX International Forum Discussion forum for topics surrounding the underground, technology and the like. http://forum.hfactorx.org/

The Shared Foums Forums of the four largest mac hacking sites. Your ultimate connection to the macintosh underground world. http://undergroundmac.com/forums

X-Ploit Team Forum Forum dedicated to hacking, cracking, phreaking and other issues. http://xploit.proboards16.com

HardPlex.com A new up and coming Hacking & Security Forum. http://www.hardplex.com

The Forbidden Web Archive Security and Development Forum with a Security Basics Forum and Vuln-Dev. http://www.forbiddenweb.org/

SecureRoot One of the worlds longest established hacking forums, offering resources covering everything from cracking to phreaking. http://www.secureroot.com

Cell Phone Hacks Mobile phone hacking discussion forum for your cell phone and computer. http://www.cellphonehacks.com/

Neon Underworld Forums on hacking, phreaking, and social engineering. http://jrbach.com

HackingForums.com Hacking and Security forum for advanced hackers. http://www.hackingforums.com

TiVo Techies Technical discussion forum on TiVo hardware, hacks and mods. http://www.tivotechies.com/

HackerLounge.com Variety of topics and tutorials related to Hacking and Phreaking. http://hackerlounge.com

HackerThreads.org - Security Forum Discussion forums with tutorials, Hacking programs and miscellanious threads. http://www.hackerthreads.org/

Phone Losers of Chicago (Amerifuck) Numbers, program and text files, recordings, prank calls, message board, zine, and links. http://jove.prohosting.com/~plac/