This is arguably my favourite free add-in for Revit. Check out the new features:
• Support for Revit 2014
• New “Toggle Section Box” command
• Ability to arrange the section box view side-by-side with the selected view
• Support for creating section boxes from view outlines, section lines, and scope boxes
• New “Quick Auto-Section” command
• Worry-free selections – automatic filtering of 2d and datum elements
Click here for a video showing the top 5 uses, including the new features.