Here is the list of prime 3. Note that these are based on Linux kernel and are free and open source

1- Kali Linux
Kali

Kali Linux is an advanced penetration testing tool that ought to be a part of every security professional’s toolbox. Penetration testing involves employing a style of tools and techniques to test the limits of security policies and procedures. What Kali has done is collect close to everything you’ll need in a single CD. It includes over three hundred different tools, all of which are open source and available on GitHub.


2-BackBox

Back Box

Backbox is a linux distribution based on Ubuntu. It has been developed to perform penetration tests and security assessments. BackBox is a lightweight OS and requires less hardware capacity. The power of this distribution is given by its Launchpad repository core constantly updated to the last stable version of the most known and used ethical hacking tools. The integration and development of new tools inside the distribution follows the commencement of open source community and particularly the Debian Free Software Guidelines criteria.

3-Parrot Security OS
Parrot Security OS

Parrot Security is an operating system based on Debian GNU/Linux mixed with Frozenbox OS and Kali linux in order to provide the best penetration and security testing experience. it is an operating system for IT security and penetration testing developed by the Frozenbox Dev Team. It is a GNU/Linux distribution based on Debian and mixed with Kali.

Parrot uses Kali repositories in order to take latest updates for almost all the tools, but it also has its own dedicated repository where all the custom packets are kept. This is why this distro is not just a simple Kali “mod” but entire new concept which relies on Kali’s tool repositories. As such, it introduces a lot of new features and different developing choices.Parrot uses MATE as a Desktop Environment. Lightweight and powerful interface is derived from famous Gnome 2, and thanks to FrozenBox highly customizable with captivating icons, ad-hoc themes and wallpapers. System look is proposed and designed by the community members and also members of Frozenbox Network, who are closely following the development of this project.

Where's the other 8?

Looks like spam to me...

The associated link was so helpful wow, thank you!

This is what your LQ blog is for?

The OP probably didn't finish copying/pasting:
http://tech.queryhome.com/136848/ope...ty-researchers

Lifted word-for-word. If not a spammer, yet another "I have a blog with great Linux tips!", that were just lifted from other forums.