This tool exports Object Styles from a Revit Project or Component Family. Selectively export Model, Annotation, Analytical Categories into separate text files. Track down family sourced sub-categories from all loaded families in a project. When exporting object styles from all loaded families, it may take some time to complete depending on how many families are loaded in the project.
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.