Dnscan VS ZoomEye

SearchDiggity - SearchDiggity is the primary attack tool of the Google Hacking Diggity Project.

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

OWASP Amass - An advanced open source tool to help information security professionals perform network mapping of attack surfaces and external asset discovery using open source information gathering and active reconnaissance techniques!

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

Spyse - A search engine which collects, processes, and provides structured information about network...

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