Mogwai FormMaker is another useful tool if you want to write a Swing application using JGoodies. It is a visual form editing tool for developing Swing forms using the JGoodies FormLayout. Using this tool you can fast and easily develop rich client forms.
It contains two powerful modules : a visual editor for rapid form development. The second part is a Java source generator. This generator will create all the Java classes for you.
If you are developing Java Swing application, you can have a look at this tool.