HostedScan.com - Online vulnerability scanner for servers, networks, and web applications.
Horangi - Horangi is a leading cyber-security solution that provides instant response and threat detection for companies who lack the time and expertise to monitor their system.
HackerTarget.com - Security Vulnerability Scanning based on Open Source Tools.
Intruder - Intruder is a security monitoring platform for internet-facing systems.
Acunetix - Audit your website security and web applications for SQL injection, Cross site scripting and other...
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.