Kali Linux is a Debian-derived Linux distribution designed for digital forensics and penetration testing, originally forked from Backtrack Linux by the Offensive Security team.
BlackArch Linux is an Small Arch Linux iconArch Linux -based distribution for penetration testers and security researchers. The repository contains 2554 tools.
BackBox is a Linux distribution based on Ubuntu developed to perform penetration tests and security assessments. Designed to be fast, easy to use and to provide a minimal yet complete desktop environment thanks to its own software repositories...
Matriux is a fully featured security distribution consisting of a bunch of powerful, open source and free tools that can be used for various purposes including, but not limited to, penetration testing, ethical hacking, system and network administration, cyber forensics...Discontinued
The project seems to be no longer developed. Last version, Matriux Blue, released in August 2014, can be still downloaded from SourceForge
The most advanced, powerful and yet beautiful penetration testing distribution ever created.Lined up with ultimate collection of tools for pro Ethical Hackers and Cyber Security Experts.
have not been any updates on their website in almost 2 years.