Kali Linux is a Debian-based Linux distribution aimed at advanced Penetration Testing and Security Auditing. Kali contains several hundred tools aimed at various information security tasks, such as Penetration Testing, Forensics and Reverse Engineering.
More than 600 penetration testing tools included(Bootable 8GB USB Flash drive)
Kali Linux, like BackTrack, is completely free of charge and always will be. You are free to use of Kali Linux.
Wide-ranging wireless device support / Developed in a secure environment / Multi-language support
Completely customizable / ARMEL and ARMHF support
boot repair / Partition / Clone / Backup / Recovery / Anti-Virus Utility in boot menu.