List of forum topic icons

I’m wondering what all the different topic icons on this board stand for. Is there a comprehensive list available? The FAQ notes that they exist and allows some members to pick their own thread icons, but I figure most are assigned by the mods.

You'll find these topic icons at the top of the main post itself rather than in the comments. While there isn't a dedicated menu explaining them all, for instance, the fire icon signals a potentially "hot" (controversial) thread, the star marks reminders or highlights, and the smiling face indicates humor.