• BackTrack is a distribution based on the Ubuntu Linux distribution aimed at digital forensics and penetration testing use was named after backtracking, a search algorithm.
  • Debian Linux is an operating system composed of free software mostly carrying the GNU General Public License. The operating system is developed by an internet collaboration of volunteers aligned with The Debian Project. Its focus of different kernels makes it appeal to different titles, such as Debian GNU/Linux and Debian GNU/kFreeBSD.
  • EDB: Exploit Database is an ultimate archive of exploits and vulnerable software. It's a great resource for penetration testers, vulnerability researchers, and security addicts. 
  • Kali Linux is a Debian-derived Linux distribution designed for digital forensics and penetration testing. It is maintained and funded by Offensive Security Ltd. Mati Aharoni and Devon Kearns of Offensive Security developed it by rewriting BackTrack, their previous forensics Linux distribution.
  • Git is a distributed version control and source code management (SCM) system with an emphasis on speed. Initially designed and developed by Linus Torvalds for Linux kernel development in 2005. Every Git working directory is a full-fledged repository with complete history and full version tracking capabilities, not dependent on network access or a central server.
  • Offensive Security is a proactive and adversarial approach of protecting computer systems, networks and individuals from attacks. Conventional security -- sometimes referred to as "defensive security" -- focuses on reactive measures, such as patching software and finding and fixing system vulnerabilities. In contrast, offensive security team focused on seeking out the perpetrators and in some cases attempting to disable or at least disrupt their operations.
  • Social-Engineer Toolkit or SET is an open-source tool, written in Python. It is designed to perform advanced attacks (penetration testing) against the human element (i.e. Social-Engineering). 
  • Wireless Driver is the main source of Documentation for the Linux wireless (IEEE-802.11) subsystem. Check out your wireless vendor from this site.
  • UVC Driver and Tools: UVC (USB Video Class) is a device driver for video streaming on Universal Serial Bus. UVC specification covers webcams, digital camcorders, analog video converters, analog and digital television tuners and still-image cameras that support video streaming for both video input and output.