www.combatstats.com/
Has a program to calculate combat stats I just downloaded this a couple days ago so I don't know much about it. right now though in order to use this tool you have to be playing in Windowed mode and continually leaving the game to reset the monitor or get numbers or what have you. On this sites home page they have a link where they are currently trying to design a UI window to where you could use this monitor from full screen mode.... I would love to see some sort of simple UI window that let you view group dps info and reset it for the next round maybe print it to group chat...