Defaults Manager enables you to view and edit the preferences of almost any application that are stored in your User Defaults database.
The info is presented in a standard 3 pane window [pix]. I haven't tried the demo, but it looks strait forward to me. Guess it could come in handy eventually.
Price is USD 35, with a 10% off if you use coupon "KNDM100BETA" when purchasing while still in beta.