Kali Linux is described as 'Debian-derived Linux distribution designed for digital forensics and penetration testing, originally forked from Backtrack Linux by the Offensive Security team' and is a very popular Linux Distro in the os & utilities category. There are more than 25 alternatives to Kali Linux for a variety of platforms, including Linux, Mac, Windows, GNOME and VirtualBox apps. The best Kali Linux alternative is Parrot Security OS, which is both free and Open Source. Other great apps like Kali Linux are Tails, BlackArch, Cyborg Linux and BackBox Linux.
There are many tools are available in this Operating System. And this is the first penetration testing distro in Asia.