A good website that issue guides on how to do a build review of a device or application.

benchmarks cisecurity

HTML and XSS
XSS
Drupal Security
htaccess
XSS tutorials
Firefox plugins
HTML 5 Security

Hacking Cisco
Cisco Kits

dankalia- Hacking Linux Part I: Privilege Escalation
pretentiousname- Windows 7 UAC whitelist
pentestmonkey- Post-Exploitation Without A TTY
pretentiousname- Windows 7 UAC whitelist:Proof-of-concept source code
secmaniac- Bypass Windows 7 x86/x64 UAC Fully Patched
priv- windows-privesc-check

digininja – When All You Can Do Is Read
labs.neohapsis – Tricks of the Trade
inswomniasec – LFI with phpinfo Assistance
websec – Exploiting PHP File Inclusion Overview

pauldotcom- SSH gymnastics with proxychains
digininja- Nessus Through SOCKS Through Meterpreter
coresec- Reverse Shell Techniques for Linux
pauldotcom- Python One Line Shellcode
gnucitizen- Reverse Shell with Bash
bernardodamele- Reverse shells one-liners
secmaniac- Creating a 13 line backdoor worry free of A/V
hdesser- Get a meterpreter reverse shell through SSH tunnel
pentestmonkey- Reverse Shell Cheat Sheet

Here are some useful links to add to your pen testing lab.

Complete Operating Systems
Kioptrix
Hackademic
De-ICE
pWnOS

(Offline) Web Based
BadStore
Hackme Bank (McAfee)
Hackme Casino (McAfee)
Hackme Books (McAfee)
Hackme Shipping (McAfee)
Hackme Travel (McAfee)
Broken Web Apps Project (OWASP)
Bonsai Moth
Web Security Dojo (Maven)
Webgoat (OWASP)
Damn Vulnerable Web App
SecuriBench (Stanford)
Vicnum (ipsaplus)

(Online) Web Based
PCTechTips – pwn3d the login form
XSS Me
Can You XSS This?
Test x5s
XSS Progphp
XSS Quiz

Wireless Defence - Welcome to the Wirelessdefence.org – knowledge-base: A Wireless LAN (WLAN) security site provided for 802.11

Old Apps - Download, request, and get information on many old versions of software.

Default Router Password List - Default password for routers
Top 100 Network Security Tools – List of top security tools
Security Xploded - Useful tools and information
Social Engineer - Social Engineering – Exploiting Human Vulnerabilities.
aircrack-ng – Tool for cracking WEP and WPA
The Hackers Choice – Information and tools
fuzzdb - Lots fuzzing stuff great with dirbuster
Nmap- Nmap nse documentation