Keynote Browser from Kiwi Codes

"Kiwi Codes Keynote Browser enables users to easily add, edit and delete Keynotes. It also allows users to compare the Keynote file against all Elements in any Revit project, checking for assigned, non assigned, and broken Keynote links (where broken Keynote links are elements with a Keynote number assigned that no longer exists in the Keynote file)."

There's more information available on the Kiwi Codes website.