Acheron - Death Reports
 

"Acheron translates as the "river of woe" and it was believed to be a branch of the underworld river Styx over which in ancient Greek mythology Charon ferried the newly dead souls across into Hades."

Acheron provides an easily readable glimpse into the cause of death for anyone in your raid or party. In addition to the damage and healing that occurred to someone up to their moment of death, Acheron also tracks and displays key debuffs from bosses in 25-man raids which may also contribute to someone's death (Melt Armor on Al'ar, Corrosion on Felmyst, etc).

http://www.wowinterface.com/download...2-Acheron.html