KALI LINUX
The most advanced Penetration Testing Distribution
Kali Linux is an open-source, Debian-based Linux distribution geared towards various information security tasks, such as Penetration Testing, Security Research, Computer Forensics and Reverse Engineering.
Xfce
Xfce is a lightweight desktop environment for UNIX-like operating systems. It aims to be fast and low on system resources, while still being visually appealing and user friendly.
Xfce consists of separately packaged parts that together provide all functions of the desktop environment, but can be selected in subsets to suit user needs and preferences. This is Kali's default desktop environment.
GNOME Shell
Every part of GNOME Shell has been designed to make it simple and easy to use. The Activities Overview is an easy way to access all your basic tasks. A press of a button is all it takes to view your open windows, launch applications, or check if you have new messages. Having everything in one place is convenient and means that you don't have to learn your way through a maze of different technologies.
KDE Plasma
Plasma is made to stay out of the way as it helps you get things done. But under its light and intuitive surface, it's a powerhouse. So you're free to choose ways of usage right as you need them and when you need them.
With Plasma the user is king. Not happy with the color scheme? Change it! Want to have your panel on the left edge of the screen? Move it! Don't like the font? Use a different one! Download custom widgets in one click and add them to your desktop or panel.
