NeedToKnow
Timer bars for buffs, debuffs, cooldowns, etc.
Wrath of the Lich King 
Mists of Pandaria 
The Burning Crusade Addon Details
Expansion
Categories
Developers
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NeedToKnow tracks dots, debuffs, cooldowns and spell usability. You can use it for something as simple as tracking one dot on one target or something as advanced as an internal cooldown on one of your trinkets.
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