Format List from squidds.de ($49) will do a very nice job of that. It creates a table with a row for each of the formats. It makes it very easy to scroll down a column and see, for example, which paragraph formats use a certain font. (It doesn't show every single format, though-- but does cover all the major ones). Format List also creates tables for character formats and more.
Finding the order form on their site is always a chore, though, and there are no upgrades. You have to repurchase the utility every time FrameMaker upgrades. You can download the trial version of Finalyser, which includes all of the squidds.de utilities, including Format List. Actually, I think the old FM8 version is called Toolbox, not Finalyser.
