HEATKEYS

Possibly the most detailed CVE security vulnerability source on the internet. You can search for software and hardware vendors, products and exact version numbers of products and easily view security vulnerabilities related to them. You can view ...

The Exploit Database - Exploits, Shellcode, Vulnerability reports, 0days, remote exploits, local exploits, security articles, tutorials and more.

Redmine

Free Security Related Community about Hacking, Exploiting, Security, Pentesting, Programming Languages and a lot more. No fees, it

SecurityFocus is designed to facilitate discussion on computer security related topics, create computer security awareness, and to provide the Internet's largest and most comprehensive database of computer security knowledge and resources to...

Netcraft provide monthly Internet research reports on the hosting industry and specialise in phishing detection and countermeasures

SAINT offers integrated vulnerability scanning and penetration testing software. SAINT is a PCI Approved Scanning Vendor and SCAP-validated by NIST.

Internet Security Systems Home

Comprehensive CVE vulnerability database that integrates all U.S. Government publicly available vulnerability resources. Repository of information technology security content automation.

CentOS -- Community ENTerprise Operating System is a free rebuild of source packages freely available from a Prominent North American Enterprise Linux vendor.

Hack Forums is your entry into the dark world of hacking.