Vulnerability and exploit databases

Exploit-db - The Exploit database
.:[ packet storm ]:. - .:[ packet storm ]:.
SecurityFocus - SecurityFocus
SecurityForest - SecurityForest
NIST - NIST
OSVDB - The open source vulnerability database
SecDocs - IT security and hacking knowledge base
Nullbyte - Nullbyte.org.il
CVE-details - CVE security vulnerability database
Secunia.com - Secunia.com
CVE - Common vulnerabilities and exposures