The new version of Kali is ready for free download.
This release brings our kernel up to version 4.19.28, fixes numerous bugs, includes many updated packages, and most excitingly, features a new release of Kali Linux NetHunter!
If you would like to check out this latest and greatest Kali release, you can find download links for ISOs and Torrents on the Kali Downloads page along with links to the Offensive Security virtual machine and ARM images, which have also been updated to 2019.2. If you already have a Kali installation you’re happy with, you can easily upgrade in place as follows.
If you don’t know what Kali is , they have a great documentation which is also free