Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.
Rapid7 - Find security issues, verify vulnerability mitigations & manage security assessments with Metasploit. Get the world's best penetration testing software now. DownloadPen testing software to act like an attacker.
Tsunami - A general purpose network security scanner with an extensible plugin system for detecting high severity vulnerabilities with high confidence
OpenVAS - The Open Vulnerability Assessment System (OpenVAS) is a framework of several services and tools...
Exploit Pack - Exploit Pack is an open source project security that will help you adapt exploit codes on-the-fly.
Acunetix - Audit your website security and web applications for SQL injection, Cross site scripting and other...