"Have you ever wanted to be able to tag specific family types on specific views in your model? This tool will do just that... if the target element is already tagged in the view, it will simply skip it and move onto the next element. All element types are supported including areas, spaces, and rooms."
Update 5/8/2016: CASE and the CASE Apps website are no more but, courtesy of WeWork, the CASE Apps are now open source. They may be accessed on GitHub.