Progress Telerik UI for WinForms
RadCollapsiblePanel is a flexible control that helps you save real estate and achieve easier application navigation. Embed any content inside its collapsible area and set the ExpandDirection to adjust the control's layout per your requirements. It also provides built-in expand/collapse animations that you can turn on or off by setting the EnableAnimation property.
RadCollapsiblePanel provides rich design-time support, making customizations and configurations very easy. Some key capabilities include:
RadCollapsiblePanel arrives with a full set of themes for building professional interfaces with the look and feel of Windows 8, Office 2010, Office 2013, Metro, etc. Themes can be easily switched using a single property, or can be built from scratch to fit your specific visual demands using the Visual Style Builder productivity tool.