This is a great project created to help Developer to create custom Ribbons in a very easy way.
This Templates for SharePoint 2010 are very useful and i use a lot for a long time, since 2010 and help me create the Ribbon in a very easy ways without losing to much time validating the XML.
They have 3 different types of templates:
1. Silverlight and SharePoint project template
2. Ribbon SharePoint project template
3. OBA Deployment project template
SharePoint 2010 Extensibility Projects
You can download latest from http://blogs.msdn.com/b/pstubbs/archive/2010/04/26/sharepoint-2010-extensibility-projects-server-ribbon.aspx?wa=wsignin1.0
Hope helps and thank you for reading.