SharePoint 2010 & SharePoint Online Ribbon customization.
Ribbon Designer developer manual.
Why Ribbon Designer for SharePoint and Office 365?
Trial version is available
If you use the trial version, you can create as many tabs, groups and controls at design-time as you need but only one group will be shown at run time.
Supported SharePoint editions
Supported Office 365 subscription plans
Visual Studio versions
Note. The documentation available on our web-site is not complete. We published only selected chapters, which give step-by-step guidance on customizing the SharePoint Ribbon UI. You can download the full Developer's Guide in the PDF format from the download page.