Created for forums that will help in both tool usage, syntax, attack techniques, and collection of scripts and tools. Needs some help. I don't really frequent too many underground forums but i actually find nice one-off scripts and info i can roll into my own code in these places. Would like to add more.

http://sla.ckers.org/forum/index.php

http://www.ethicalhacker.net/

http://www.backtrack-linux.org/forums/

http://www.elitehackers.info/forums/

http://www.hackthissite.org/forums/index.php

http://securityoverride.com/forum/index.php

http://www.iexploit.org/

http://bright-shadows.net/

http://www.governmentsecurity.org/forum/

http://forum.intern0t.net/

Magazines:

http://www.net-security.org/insecuremag.php

http://hakin9.org/

Video:

http://www.hackernews.com/

http://www.securitytube.net/

http://www.irongeek.com/i.php?page=videos/aide-winter-2011

http://avondale.good.net/dl/bd/

http://achtbaan.nikhef.nl/27c3-stream/releases/mkv/

http://www.youtube.com/user/ChRiStIaAn008

http://www.youtube.com/user/HackingCons

Methodologies:

http://www.vulnerabilityassessment.co.uk/Penetration%20Test.html

http://www.pentest-standard.org/index.php/Main_Page

http://projects.webappsec.org/w/page/13246978/Threat-Classification

http://www.owasp.org/index.php/Category:OWASP_Top_Ten_Project

http://www.social-engineer.org/

OSINT

Presentations:

http://www.spylogic.net/2009/10/enterprise-open-source-intelligence-gathering-part-1-social-networks/

http://www.spylogic.net/2009/10/enterprise-open-source-intelligence-gathering-%E2%80%93-part-2-blogs-message-boards-and-metadata/

http://www.spylogic.net/2009/10/enterprise-open-source-intelligence-gathering-part-3-monitoring/

http://www.slideshare.net/Laramies/tactical-information-gathering

http://www.sans.org/reading_room/whitepapers/privacy/document_metadata_the_silent_killer__32974

http://infond.blogspot.com/2010/05/toturial-footprinting.html

People and Organizational:

http://www.spokeo.com/

http://www.123people.com/

http://www.xing.com/

http://www.zoominfo.com/search

http://pipl.com/

http://www.zabasearch.com/

http://www.searchbug.com/default.aspx

http://theultimates.com/

http://skipease.com/

http://addictomatic.com/

http://socialmention.com/

http://entitycube.research.microsoft.com/

http://www.yasni.com/

http://tweepz.com/

http://tweepsearch.com/

http://www.glassdoor.com/index.htm

http://www.jigsaw.com/

http://searchwww.sec.gov/EDGARFSClient/jsp/EDGAR_MainAccess.jsp

http://www.tineye.com/

http://www.peekyou.com/

http://picfog.com/

http://twapperkeeper.com/index.php

Infrastructure:

http://uptime.netcraft.com/

http://www.serversniff.net/

http://www.domaintools.com/

http://centralops.net/co/

http://hackerfantastic.com/

http://whois.webhosting.info/

https://www.ssllabs.com/ssldb/analyze.html

http://www.clez.net/

http://www.my-ip-neighbors.com/

http://www.shodanhq.com/

http://www.exploit-db.com/google-dorks/

http://www.hackersforcharity.org/ghdb/

Exploits and Advisories:

http://www.exploit-db.com/

http://www.cvedetails.com/

http://www.milw0rm.com/ (Down permanently)

http://www.packetstormsecurity.org/

http://www.securityforest.com/wiki/index.php/Main_Page

http://www.securityfocus.com/bid

http://nvd.nist.gov/

http://osvdb.org/

http://www.nullbyte.org.il/Index.html

http://secdocs.lonerunners.net/

http://www.phenoelit-us.org/whatSAP/index.html

http://secunia.com/

http://cve.mitre.org/

Cheatsheets and Syntax:

http://cirt.net/ports_dl.php?export=services

http://www.cheat-sheets.org/

http://blog.securitymonks.com/2009/08/15/whats-in-your-folder-security-cheat-sheets/

Agile Hacking:

http://www.gnucitizen.org/blog/agile-hacking-a-homegrown-telnet-based-portscanner/

http://blog.commandlinekungfu.com/

http://www.securityaegis.com/simple-yet-effective-directory-bruteforcing/

http://isc.sans.edu/diary.html?storyid=2376

http://isc.sans.edu/diary.html?storyid=1229

http://ss64.com/nt/

http://pauldotcom.com/2010/02/running-a-command-on-every-mac.html

http://synjunkie.blogspot.com/2008/03/command-line-ninjitsu.html

http://www.zonbi.org/2010/06/09/wmic-the-other-other-white-meat/

http://rstcenter.com/forum/22324-hacking-without-tools-windows.rst

http://www.coresecurity.com/files/p_w_uploads/Core_Define_and_Win_Cmd_Line.pdf

http://www.scribd.com/Penetration-Testing-Ninjitsu2-Infrastructure-and-Netcat-without-Netcat/d/3064507

http://www.pentesterscripting.com/

http://www.sans.org/reading_room/whitepapers/hackers/windows-script-host-hack-windows_33583

http://www.blackhat.com/presentations/bh-dc-10/Bannedit/BlackHat-DC-2010-Bannedit-Advanced-Command-Injection-Exploitation-1-wp.pdf

OS and Scripts:

http://en.wikipedia.org/wiki/IPv4_subnetting_reference

http://www.nixtutor.com/linux/all-the-best-linux-cheat-sheets/

http://shelldorado.com/shelltips/beginner.html

http://www.linuxsurvival.com/

http://mywiki.wooledge.org/BashPitfalls

http://rubular.com/

http://www.iana.org/assignments/port-numbers

http://www.robvanderwoude.com/ntadmincommands.php

http://www.nixtutor.com/linux/all-the-best-linux-cheat-sheets/

Tools:

http://www.sans.org/security-resources/sec560/netcat_cheat_sheet_v1.pdf

http://www.secguru.com/files/cheatsheet/nessusNMAPcheatSheet.pdf

http://sbdtools.googlecode.com/files/hping3_cheatsheet_v1.0-ENG.pdf

http://sbdtools.googlecode.com/files/Nmap5%20cheatsheet%20eng%20v1.pdf

http://www.sans.org/security-resources/sec560/misc_tools_sheet_v1.pdf

http://rmccurdy.com/scripts/Metasploit%20meterpreter%20cheat%20sheet%20reference.html

http://h.ackack.net/cheat-sheets/netcat

Distros:

http://www.backtrack-linux.org/

http://www.matriux.com/

http://samurai.inguardians.com/

http://www.owasp.org/index.php/Category:OWASP_Live_CD_Project

https://pentoo.ch/

http://www.hackfromacave.com/articles_and_adventures/katana_v2_release.html

http://www.piotrbania.com/all/kon-boot/

http://www.linuxfromscratch.org/

http://sumolinux.suntzudata.com/

http://blog.0x0e.org/2009/11/20/pentesting-with-an-ubuntu-box/#comments

http://www.backbox.org/

Labs:

ISOs and VMs:

http://sourceforge.net/projects/websecuritydojo/

http://code.google.com/p/owaspbwa/wiki/ProjectSummary

http://heorot.net/livecds/

http://informatica.uv.es/~carlos/docencia/netinvm/

http://www.bonsai-sec.com/en/research/moth.php

http://blog.metasploit.com/2010/05/introducing-metasploitable.html

http://pynstrom.net/holynix.php

http://gnacktrack.co.uk/download.php

http://sourceforge.net/projects/lampsecurity/files/

https://www.hacking-lab.com/news/newspage/livecd-v4.3-available.html

http://sourceforge.net/projects/virtualhacking/files/

http://www.badstore.net/

http://www.irongeek.com/i.php?page=security/mutillidae-deliberately-vulnerable-php-owasp-top-10

http://www.dvwa.co.uk/

http://sourceforge.net/projects/thebutterflytmp/

Vulnerable Software:

http://www.oldapps.com/

http://www.oldversion.com/

http://www.exploit-db.com/webapps/

http://code.google.com/p/wavsep/downloads/list

http://www.owasp.org/index.php/Owasp_SiteGenerator

http://www.mcafee.com/us/downloads/free-tools/hacmebooks.aspx

http://www.mcafee.com/us/downloads/free-tools/hacme-casino.aspx

http://www.mcafee.com/us/downloads/free-tools/hacmeshipping.aspx

http://www.mcafee.com/us/downloads/free-tools/hacmetravel.aspx

Test Sites:

http://www.webscantest.com/

http://crackme.cenzic.com/Kelev/view/home.php

http://zero.webappsecurity.com/banklogin.asp?

http://testaspnet.vulnweb.com/

http://testasp.vulnweb.com/

http://testphp.vulnweb.com/

http://demo.testfire.net/

http://hackme.ntobjectives.com/

Exploitation Intro:

If you'd like to get into exploit dev, these are really the guides and docs that will start you off in the right direction. Since Exploit dev is not my primary occupation this section could always use help.

http://myne-us.blogspot.com/2010/08/from-0x90-to-0x4c454554-journey-into.html

http://www.mgraziano.info/docs/stsi2010.pdf

http://www.abysssec.com/blog/2010/05/past-present-future-of-windows-exploitation/

http://www.ethicalhacker.net/content/view/122/2/

http://code.google.com/p/it-sec-catalog/wiki/Exploitation

http://x9090.blogspot.com/2010/03/tutorial-exploit-writting-tutorial-from.html

http://ref.x86asm.net/index.html

Reverse Engineering & Malware:

http://www.woodmann.com/TiGa/idaseries.html

http://www.binary-auditing.com/

http://visi.kenshoto.com/

http://www.radare.org/y/