Obituary is a mod that displays deaths of people in your party/raid, and what killed them. By default it just shows the last damage they took.
I asked Darthn if he could modify it to show the last 3 damage sources, print it to chat, and put the skull icon in front of it to make separate entities dying close together easily distinguishable. The different colored name is due to my chat mod, not the mod. Note that this isn't broadcasted in /say or /raid or anything, it's just sent to your default chat window so it doesn't spam others.
You'll need to download Obituary and then use this modded .lua zipped to get it to work if you want to use it.
Thanks again to Dart + "erob"!
(attached file is newest version, FIXED the minor problem of not listing some deaths rarely, 4/26/09)