Docker- The Lightweight Container Engine

Docker is an open source platform for developers and system admins to build, ship and run distributed applications as a lightweight container. Docker consists of Docker Engine- a portable, lightweight run-time and packaging tool and Docker Hub- a cloud service for sharing applications and automating workflows, Docker enables apps to be quickly assembled from components and eliminates the friction between development, QA, and production environments. As a result, IT can ship faster and run the same app, unchanged, on laptops, data center VMs and any cloud.

Documentation: Please read the Docker documentation from here.
Download Link: Please download Docker from here.
Article: Please read the article on Official Kali Linux Docker Images.

Privoxy

Privoxy or privacy enhancing proxy, is non-caching web proxy with advanced filtering capabilities enhancing for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing internet ad. Privoxy is a free software project under GNU GPL, it is flexible and can configured with almost all web browser. It has application for both stand-alone systems and multi-user networks. For user documentation and download, click here.