I recently got a Mac and took a look at their dashboard widgets. Such widgets consist of several files: An HTML file A CSS file A JavaScript file Image files Of course, I had to try to see how hard it would be to do the same thing in F3. Here’s the F3 version of the Calculator widget: Unfortunately, it’s currently impossible to create transparent windows in Java on non-MacOS platforms, so in those cases you won’t see the dropshadow and rounded corners. It only took a few minutes to write the visual elements in F3 (I just used F3Pad). And about another hour to add the behavior (I borrowed the design of the non-visual part of the calculator from an ancient Java applet I found on the net). F3 Source: Calculator.f3 Original Source: Calculator.html Calculator.css Calculator.js Software Development