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

Social-Engineer Toolkit - The Social-Engineer Toolkit is an open source penetration testing framework designed for social...

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

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

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

Cobalt Strike - Advanced threat tactics for penetration testers.