Our developers continue improving Stimulsoft Reports.Wpf - reporting tool for Windows Presentation Foundation. Ribbon UI in the report viewer is added. Ribbon interface is organized simply and logically. All controls are grouped according to their functions, which improves user interface usability. You can use the viewer right now. In the prerelease build of the product from November 3, 2010 this feature is already included and available for evaluation. You may download the prerelease build here.