A simple yet powerful Gantt chart library for Java 1.6 and later. DGantt is lightweight, requires no external libraries, is fast and efficient, and is currently deployed in several industrial projects.
Also check out other projects from the author, including the MOEA Framework (http://www.moeaframework.org) and TSPLIB4J (https://github.com/dhadka/TSPLIB4J/).
This is a free OpenSource Microsoft Project file Viewer. It relies on the "Apache POI - Java API To Access Microsoft Format Files" project. A bundle distribution of the application can be accessed from the following url: http://mspviewer.blogspot.com/
If you like this software and are a developer, check out:
https://sourceforge.net/projects/crudzillawebapplicationbuilder/