QT Designer, Glade, Gazpacho, VS and Delphi in Windows - they all have one problem - they only can do the interface stuff.

The Firefox plugin is good at adding additional elements like arrows and boxes and is not that big and heavy as the rest. It can also do several interface types at once and can be easily extended with more elements (with XUL and JS). Also can be kinda good of prototyping web interfaces (though simple ones). Which of the tools can do this?

(EDIT: There's rotate function too)