This document outlines 5 reasons why the developer toolkit NetBeans should be used by all developers. It discusses how NetBeans allows users to work with multiple projects and languages at once using plugins, helps with debugging code through its configurable toolbar, makes automated testing easy through JUnit and scripting for continuous integration, assists with writing better code quicker through its features, and can be used as a platform for developing applications. The document is the opinion of a Java developer who has experience using various IDEs and toolkits including NetBeans.