Here's a small Contact List app, created in DukeScript, with a bit of help from Jaroslav Tulach. It is shown below running in the browser on my desktop, as well as in the JavaFX WebView:
Here's the sources, unzip them, you'll have Maven projects to work with.
I don't have Android setup and no Mac OSX available, so I didn't include the related Maven projects for those devices.
Soon I will blog about the code used in this example and make a screencast about it.