Try this one created as a customview, I have tried to reproduce the Windows functionality, I don't have a mac, so can't emulate that. If you want to change it do look like Mac or Linux, it won't be very difficult. It's all done in a layout file.
The only two methods are Title, to set the title and Icon to set an icon. I've included my FormUtils so that setting the Icon, sets it as the item to show in the task bar.
Setting the colour, font sizes etc is done in the layout: TitleBar, The actual TitleBar colour is set as the Background for the TitleBarBG pane.
The only thing I haven't done is put a context menu on the icon, that's simple enough if you want to.
It would easily be possible to customize it as required. Let me know how you get on with it.