Content Defined in XAML, organised horizontally Red Green Blue Content Bound From View Model, organised vertically Add New Bound Person You can drag tabs around. + Trapezium/Trapezoid...pretty useful for tabs This is a dragablz item, which can be resized...pretty cool to let text arrange. Try dragging the bottom right of the border. A simple example style is used, but you can also create your own grips in content using DragablzItem.SizeGrip. This is a dragablz item, is floating aroung happily, you can size it on any part of the border, and drag it anywhere. Ahh c'mon, this is basically just a tool window! I know you are asking where the close button is. Keep asking. Haven't got there yet. But this is WPF, so don't get lazy, just style it in for yourself!