I am coding a lot for one my projects, JHTMLCleaner. The first beta will be out shortly. I wanted the application to run as

• an applet
• a GUI application
• a servlet
• a console application
• an Apache Ant task

The first beta will probably only feature a GUI while I'll be working on other parts. It will also help me by getting quick feedback from users.
In the meantime I'll be thinking about integration with XPontus XML Editor as a plugin.