ZoomEye VS Vega

Shodan - Shodan is the world's first search engine for Internet-connected devices.

w3af - w3af is a Web Application Attack and Audit Framework

Censys - Censys helps organizations, individuals, and researchers find and monitor every server on the Internet to reduce exposure and improve security.

Exploit Pack - Exploit Pack is an open source project security that will help you adapt exploit codes on-the-fly.

Zed Attack Proxy - The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding...

Armitage - Armitage makes penetration testing easy by adding a GUI to the Metasploit framework