This is my first contribution in an ongoing series on detailing the best free, open source hacking and penetration tools available. My goal is to show you some of the quality tools that IT security experts are using every day in their jobs as network security and pen-testing professionals. There are hundreds of tools out there, but I will focus and those that meet four key criteria: Open source Free High quality Widely used and trusted in the IT security/pen-testing community As such, no hacker/penetration tool box is complete without the addition of the versatile and powerful Metasploit . What Is Metasploit? Metasploit is among the most widely used exploitation tools in the hacking/security field. It's used by both novices and advanced professionals. Insecure.Org , run by Fyodor , the founder of Nmap , annually surveys security professionals for their opinion on the top security software. Metasploit has consistently ranked among the top ten since its incept