I added a !fudge trigger which can be used for Fudge/Fate and other games which use Fudge (plus/minus/blank-sided) dice. It includes a smilie pack for the icons to show the results. The trigger has an option to disable the icons and just use text. See an example here.
To install, upload the contents of the upload folder as you normally would to install an add-on, then re-import the triggers XML file from the admin trigger list, and then import the smilies XML file from the admin smilies list.