Module 1: Zenmap
Zenmap is the official Nmap Security Scanner GUI. It is a multi-platform (Linux, Windows, Mac OS X, BSD, etc.) free and open source application which aims to make Nmap easy for beginners to use while providing advanced features for experienced Nmap users.
References:
Zenmap - Official cross-platform Nmap Security Scanner GUI. (n.d.). Retrieved February 28, 2015, from http://nmap.org/zenmap/