jvider - A new GUI builder tool for JavaTM Swing applications released. With jvider you can easily design graphical user interfaces for your JavaTM applets and applications.
It does just what you need - easily design graphical user interface, test it and produce tidy JavaTM source code. No custom libraries, no custom development environment, nothing. Just a tool to make your life easier.
Other features of jvider:
gridBagLayout is used for layout (no absolute positioning);
interactive UI design with drag & resize features;
testing UI on the fly without compiling;
ability to save/load your designs;
view and export produced Java source code as Frame or Applet;
intuitive interface. Easy to understand and comprehend;
easy to get started with tutorial and samples provided.