so you're asking is there something that does exactly that?
no...
you could make it though...
using the current user list plugin... (search for user list)
you'd need to associate an image with every user, which would probably be easiest by requiring an avatar at signup which would require modifying the user registration (do a search for user registration)...
then it would just be a question of formatting the output of the user list plugin to display the avatar that the user supplied along with whatever other info you wanted displayed.