Debian Linux & Kali Linux are now available for download from Microsoft Store.
About Debian Linux app:
With this app you get Debian GNU/Linux for the Windows Subsystem for Linux (WSL). You will be able to use a complete Debian command line environment for the current stable release (9/stretch).
About Kali Linux app:
The Kali for Windows application allows one to install and run the Kali Linux open-source penetration testing distribution natively, from the Windows 10 OS. To launch the Kali shell, type “kali” on the command prompt, or click on the Kali tile in the Start Menu.
You can download the above apps from the links given below.