nuclei - Learn how to use Nuclei engine to write your own custom security checks with very simple and easy to use templating syntax.
HostedScan.com - Online vulnerability scanner for servers, networks, and web applications.
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.
HackerTarget.com - Security Vulnerability Scanning based on Open Source Tools.
OpenVAS - The Open Vulnerability Assessment System (OpenVAS) is a framework of several services and tools...
Intruder - Intruder is a security monitoring platform for internet-facing systems.