Metasploit

Metasploit is a penetration testing framework maintained by Rapid7, built around a large and actively updated library of exploit modules, payloads and auxiliary tools used to identify and verify security vulnerabilities in systems and networks. The open-source Metasploit Framework is free, command-line driven via msfconsole, and integrates with tools like Nmap; it is pre-installed on distributions like Kali Linux and has installers for Windows, macOS and Linux. Rapid7 also sells Metasploit Pro, a commercial edition with a GUI, workflow automation and reporting aimed at professional penetration testers and security teams, priced on request. The project has a large open-source community, with tens of thousands of GitHub stars and hundreds of new modules contributed over time.