Free Basic Reporting Add-in for Hosting and Formulas (Updated)
"Have you ever needed to export a list of elements that host other elements? Or better yet, have you ever wondered what formulas were inside each of your families in the model? This little tool exports this information for you to a CSV file of your choosing! This entire utility runs in Read-only mode, so no worries about damaging anything..."
This free add-in may be downloaded from the Case Apps website.
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.