Other hacking sites/wargames

Web-Based:

- hack4u.org
basic html/javascript
basic encryption
etc

- try2hack.nl
javascript and such?

- hackthissite.org
basic html/javascript
realistic
application
programming
extended basic
javascript
stego
irc bot

- hackquest.de
Applet
CrackIt
Crypto
Exploit
Flash
Internet
Javascript
Linux
Logic
Programming
Special
Stegano

- antica.bestweb.net (challenging, but lower quality?)
encryption
cracking
java
javascript
logic
math
programming
research
tools

- http://es.geocities.com/roger_fan_morvill/
Reverse Engineering
Crypto
Stegano
Javascript
Numerical (patterns)

- http://www.daedlaus.com/sk00l/
lotta random stuff, low/med quality?

- hellboundhackers.org
web
encryption
sql/enumeration
flash
programming
simulated *nix-like challenges

- http://www.dareyourmind.net/
javascript
crypto
stego
logic
realistic
programming
reverse engineering

- http://www.osix.net/
Reverse Engineering
Brute Forcing
Stego
Crypto
Math

- http://www.bright-shadows.net/
Stego
Reverse Engineering/cracking
Crypto
Math
Programming
Javascript
Exploitation
Flash + Java exploitation
Info Gathering

Terminal Based:

- OverTheWire

- SmashTheStack

- intruded.net

- Astalavista (www.astalavista.com/hacking)
Server #1 - RedHat 4
http://www.astalavista.com/index.php?page=375
srv3.thewargames.com
Server #2 - Windows 2003 Standard
http://www.astalavista.com/index.php?page=376
srv4.thewargames.com
Server #3 - Windows Workstation
http://www.astalavista.com/index.php?page=377
srv4.thewargames.com

Etc:

-honeynet.org/challenges
Reverse Engineering?

- http://crackmes.de/
cracking and reverse-engineering

Paid Teaching Sites:

- http://hacking-lab.com/
seem to do events, or you can pay $20/lesson for a large array of lessons/tutorials/hands-on practice things

- offensive-security.com
pen testing and wifi cracking, etc

I'll fix the formatting some other time, and feel free to suggest other sites to be added to this list!