Parrot
Floating Combat Text of awesomeness. Caw. It'll eat your crackers.
Cataclysm 
The Burning Crusade 
Wrath of the Lich King Addon Details
Expansion
Developers
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Displays Events from the combatlog (damage, healing, …) as moving text and numbers across the Screen. It also supports various other Events (Loot, Cooldowns, …). Further Parrot offers a Trigger-system to display Text and play sounds on certain predefined events (e.g. Nightfall for Warlocks).
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Mists of Pandaria
5.4.8More addons for Mists of Pandaria
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