Wireshark is a free and open-source packet analyzer.

wireshark

Windows

Discover hosts and services on a computer network by sending packets and analyzing the responses

A recursive internet scanner for hackers.

World's fastest and most advanced password recovery utility

A tool for pentesters to help find delicious candy.

Helps users "guess" their target's email address based on multiple inputs and preferences.

Password spraying tool, uses FireProx APIs to rotate IP addresses, stay anonymous, and beat throttling

A small tool built to find and fix common misconfigurations in Active Directory Certificate Services.

Search emails from a domain through search engines

Search for documents in a domain through Search Engines (Google, Bing and Baidu). The objective is to extract metadata

Fast and customizable vulnerability scanner based on simple YAML based DSL.

Accurately identify, investigate and prioritize vulnerabilities. 