Fyodor's Exploit World  
   A large and descriptive exploit archive organized by affected operating systems.
   http://www.insecure.org/sploits.html

K-otik Exploit Archive  
   Archive of current 0day exploits from European and Asian sources.
   http://www.k-otik.com/exploits/

malware.com  
   malware - malicious software. The examination of security on the internet.
   http://www.malware.com/

Metasploit Project  
   Exploit/shellcoding generation tool.
   http://metasploit.org

Basics of Win32 Shatter Attacks  
   Step by step guide to privilege escalation using shatter attacks.
   http://security.tombom.co.uk/shatter.html

HoobieNet's Security Exploits  
   Collection of security exploits for various operating systems.
   http://www.hoobie.net/security/exploits/

PacketStorm  
   Large archive of exploits categorized by subject.
   http://www.packetstormsecurity.org/

Security Tracker  
   Archive of exploits and security advisories
   http://www.securitytracker.com

Trivia Security - Exploits Archive  
   Latest 0day expoits.
   http://triviasecurity.net/?id=exploits

The Hacker's Choice  
   Website for various exploits and hacking tools (such as hydra)
   http://www.thc.org

Phenoelit  
   FX's tools page, concentrates on network device exploits (IOS, etc.)
   http://phenoelit.de/fr/tools.html

Ethical Hacking Course  
   Commerical hacker training course on how to write and use exploits
   http://www.infosecinstitute.com/courses/ethical_hacking_training.html

NGS Research  
   Series of papers on how to write exploits and discover vulnerabilities
   http://www.nextgenss.com/papers.htm

Network Security Archive  
   A collection of mailing list archives dealing with exploits, vulnerability development and hacking
   http://www.networksecurityarchive.org

Exploit Caller ID  
   The Software Orange Box is a free proof-of-concept tool which can spoof most forms of North American Caller ID.
   http://artofhacking.com/orange.htm

milw0rm.com  
   Exploit database separated by exploit type (local, remote, DoS, etc.)
   http://www.milw0rm.com

Core Impact  
   Commercial exploit software package with GUI
   http://www1.corest.com/products/coreimpact/index.php