ncKillingBlow is a simple addon that announces in the center of your screen when you get a killing blow. That's all, nothing more, nothing less.
Install & go! No config.
After requests to go back to the older ncKillingBlow style, I have decided to include both in the download. If you prefer the newer style, use ncKillingBlow. If you prefer the older style, use ncKBClassic. Do not use both at the same time.