This addon monitors all damage events around you and plots them on a graph. wow Limitation: Range is about 40-45 yards, or roughly the buff range. It can be used in raids to see how much dps the entire raid is doing on the boss, and how it changes as a function of time. You can get a few more stats if you put your mouse over the graph as can be seen on the second screenshot.
Please post all suggestions, requests, and bugs in the comments section.