DigitalRune Docking Windows

This .NET library adds dockable windows to any Windows Forms application. The library features: dockable windows similar to Microsoft® Visual Studio®, docking via drag-and-drop including docking hints, complex window layouts, tabbed documents, auto-hide windows, floating windows, custom tooltips and context menus, persistence of the window layout to XML, different rendering styles and color themes. Free for non-commercial use.