Protoreto is a GPL-licensed tool to create prototypes of graphical user interfaces (GUIs).
NOTE: This project is not actively maintained at the moment. If you'd like to continue developing Protoreto, please send an e-mail to: wikipedian@users.sf.net
Magritte is a framework to build user interfaces for Java, which are saved in XML files, allowing a user to change the interface without the need to recompile the code. It will also generate Java code to respond to GUI events.