SAP GUI for the Java is a unified SAP frontend for multiple platforms.
WebCream provides automated web-enabling for GUI based Java applications.
Mars Microsystems Company
The easiest Java Swing GUI builder generating human readable Java code.
FormDev Software GmbH
JFormDesigner is a professional GUI designer for Java Swing user interfaces.
GWT Designer is a powerful and easy-to-use bi-directional Java GUI designer.
Java based Keytool GUI for managing certificate files.
An open source Java XML editor with a configurable GUI.
CookSwing is a library which builds Java Swing GUI from XML documents.
EzTrans is Java-based GUI tool for HTML5 authoring.