Important

With the Q1 2013 release, the RadRibbonBar control will be removed. Please update your applications to use the RadRibbonView control instead. As both controls share mostly the same API, the upgrade should be as easy as: Changing the referenced assembly by replacing the Telerik.Windows.Controls.RibbonBar.dll with the Telerik.Windows.Controls.RibbonView.dll Changing the name of the control in its definition The only difference in the API of the two controls is in the ContextualTabs definitions - in the RadRibbonView, the ContextualTabs should be defined as described in this tutorial In this blog post you can find more info about the advantages of the RadRibbonView control.

Telerik Silverlight RibbonBar is an implementation of the Microsoft Office 2007 “ribbon” UI, which allows you to codelessly organize the navigation functionality of your application into a single compact toolbar control. Its popup engine, dynamic resizing and powerful customization capabilities make the Silverlight RibbonBar your shortcut to creating powerful navigation systems.

RadRibbonBar key features list:

• MS Office 2007 Interface at your Fingertips
• Automatic Resizing and Minimization
• Galleries and Pop-ups
• Application Menu, Recent Documents Menu
• Quick Access Toolbar
• Nested Controls
• Screen Tips
• Styling and Appearance
• Commands Support
• Localization Support
• Enhanced Routed Events Framework
• All Telerik controls for Silverlight support styling with Expression Blend
• WPF/Silverlight Code Compatibility
• Codeless Test Automation for Scheduler

A complete list with all the key features can be found here.

Check out the online demo at: http://demos.telerik.com/silverlight/#RibbonBar/FirstLook