Find Orphaned Keynotes with this free addin

Download from Autodesk Exchange

This app will generate a report of all keynotes in your Autodesk® Revit® model, with information about user, material, and element keynotes and which keynotes are orphaned.

More info:
Free Keynote Reporter now available on Revit App Store | Boost Your BIM – making Revit even better

Heads-up:
Revit Add-Ons: Free Keynote Reporter Add-in for Autodesk Revit