Practice CTF List / Permanant CTF List

I'm on a mission to becoming a great penetration tester. This is a list of CTF's 

Note: some links might or might not work so just try them. 

Live Online Games

Recommended

Whether they're being updated, contain high quality challenges, or just have a lot of depth, these are probably where you want to spend the most time.

• http://pwnable.kr/ (one of the more popular recent wargamming sets of challenges)
• https://picoctf.com/ (Designed for high school students while the event is usually new every year, it's left online and has a great difficulty progression)
• https://microcorruption.com/login (one of the best interfaces, a good difficulty curve and introduction to low-level reverse engineering, specifically on an MSP430)
• http://reversing.kr/
• http://hax.tor.hu/
• https://w3challs.com/
• https://pwn0.com/
• http://www.smashthestack.org/
• http://ringzer0team.com/
• http://www.hellboundhackers.org/
• http://www.overthewire.org/wargames/
• http://counterhack.net/Counter_Hack/Challenges.html
• http://www.hackthissite.org/
• http://vulnhub.com/

Others

• http://hackthecause.info/
• http://bright-shadows.net/
• http://www.mod-x.co.uk/main.php
• http://scanme.nmap.org/
• http://www.hackertest.net/
• http://net-force.nl/
• http://securityoverride.org/ Some good concepts, but "canned" vulnerabilities (string matching on input) will frustrate knowledgable hackers and teach newbies the wrong lessons

Meta

• http://www.wechall.net/sites.php (excellent list of challenge sites)
• http://ctf.forgottensec.com/wiki/ (good CTF wiki, though focused on CCDC)
• http://repo.shell-storm.org/CTF/ (great archive of CTFs)

Webapp Specific

• http://demo.testfire.net/
• http://wocares.com/xsstester.php
• http://crackme.cenzic.com/
• http://test.acunetix.com/
• http://zero.webappsecurity.com/

Forensics Specific

• http://computer-forensics.sans.org/community/challenges
• http://forensicscontest.com/

Recruiting

• https://www.praetorian.com/challenges/pwnable/
• http://rtncyberjobs.com/
• http://0x41414141.com/

Paid Training

• http://heorot.net/

Downloadable Offline Games

• http://www.badstore.net/
• http://www.owasp.org/index.php/Category:OWASP_WebGoat_Project
• http://www.owasp.org/index.php/Owasp_SiteGenerator
• Damn Vulnerable Web App
• Stanford SecureBench
• Stanford SecureBench Micro
• http://www.irongeek.com/i.php?page=security/mutillidae-deliberately-vulnerable-php-owasp-top-10

Virtual Machines

• https://pentesterlab.com/exercises/
• http://sourceforge.net/projects/metasploitable/files/Metasploitable2/
• Damn Vulnerable Linux (not currently live? local mirror)

Inactive or Gone

Just around for historical sake, or on the off-chance they come back.

• http://rootcontest.com/
• http://intruded.net/
• https://how2hack.net
• WebMaven (Buggy Bank)
• http://www.foundstone.com/us/resources/proddesc/hacmetravel.htm
• http://www.foundstone.com/us/resources/proddesc/hacmebooks.htm
• http://www.foundstone.com/us/resources/proddesc/hacmecasino.htm
• http://www.foundstone.com/us/resources/proddesc/hacmeshipping.htm
• http://hackme.ntobjectives.com/
• http://testphp.acunetix.com/
• http://testasp.acunetix.com/Default.asp
• http://prequals.nuitduhack.com
• http://www.gat3way.eu/index.php (Russian)
• http://exploit-exercises.com/ (challenges mirrored on vulnhub)
• http://damo.clanteam.com/
• http://p6drad-teel.net/~windo/wargame/
• http://roothack.org/
• http://ha.ckers.org/challenge/
• http://ha.ckers.org/challenge2/
• http://www.dc3.mil/challenge/