Has every option you could ever want for controlling the who and when of where a widget displays. Only upset is that setting the display options is done via another page i.e view the widget you want to control visibility of, click the 'static' or 'dynamic' link at the bottom of the widget and then you're taken to another screen where the visibility settings are managed. If that could be done in a popup, this plugin would be even more awesome.
Thank you Mr Developer. You'll find a donation on its way to you. Regards, LAH.