I spent a significant amount of time looking for and evaluating Gantt chart packages and component libraries for use in a project, and they all paled in comparison to the kind of look and feel, features and flexibility offered by FlexGantt. With simple and straight-forward licensing, no ridiculous sales people to deal with, and backed by an excellent software developer - I would highly recommend FlexGantt for any and all of your Gantt charting needs within a Java-based desktop application.