OpenVAS is a vulnerability scanner. It is a framework of several services and tools offering a comprehensive and powerful vulnerability scanning and vulnerability management solution. It is open source and it is free.
Click here for instructions on installing OpenVAS in Kali.
The installation process worked for me as of 6/29/2016 although it required more than one attempt by me to get it to install properly.
OpenVAS uses the Greenbone Security Assistant.
The Greenbone Security Assistant is a web application that connects to the OpenVAS Manager and OpenVAS Administrator to provide for a full-featured user interface for vulnerability management.
In order to use The Greenbone Security Assistant, point your browser to https://127.0.0.1:9392.