Parrot Security (Parrot OS, Parrot) is a free and open source GNU/Linux distribution based on Debian Testing designed for security experts, developers and privacy aware people.
It includes a full portable arsenal for IT security and digital forensics operations, but it also includes everything you need to develop your own programs or protect your privacy while surfing the net.
The operating system ships by default with either MATE or KDE desktop environments and is available in several flavors to fit your needs.