Acunetix - Audit your website security and web applications for SQL injection, Cross site scripting and other...
w3af - w3af is a Web Application Attack and Audit Framework
Shodan - Shodan is the world's first search engine for Internet-connected devices.
Nikto - Nikto is an Open Source (GPL) web server scanner which performs comprehensive tests against web...
Intruder - Intruder is a security monitoring platform for internet-facing systems.
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.