A small damage meter presented by an animated anime friend in the corner (the art is not copyright to anyone - I created it myself, including the animations).
A damage meter allows a player to know how much damage they're doing over time, so they can aim to improve their game play.
The character is animated, and will appear to be playing a video game while the player is dpsing or hpsing (including blinks and hand movement on the controller).
After a few seconds of combat/healing inactivity, the running total will be reset automatically and the anime girl will fall asleep.
The DPS calculation that presents the player character's running DPS total provides results that are 99% identical to a much larger/heavyweight parser like Details - however this is much more lightweight - the entire mod is less than 300 LOC and the dps/hps calculations are done in about 1/10th of that).
The user can toggle between dps (damage per second) and hps (healing per second) modes, see "/dpsgirl" or "/dg" slash command for more info.
See a demo animation/repo source code at https://github.com/ahungry/WowDpsGirl