SharePoint 2013 Easy Ribbon provide easy API for Ribbon creation and managing in SharePoint 2013. Based on the SharePoint 2010 Fluent Ribbon API (with small source code changes, repack and rebuild for SharePoint 2013).
The Cube Status project provides a SharePoint Web Part that connects to a SQL Server Analysis Services instance and shows the status of a specific cube. This is useful for BI portal type pages where information about the status of BI resources are of benefit.
This project shows how to create a Custom Workflow Action for SharePoint Designer 2013.