A mod that tracks any string that can show up in your combat log, and then event that triggers them.
Just use /et to toggle the window, and then type in the string you're searching for, and then frame will fill with the string (and its event) as they appear.
Makes it very easy to identify the events that fire for any particular string. Originally I was using SCT's debug functions to add the event names to all strings in the combat log, but got tired of all the horrible spam.