NeedToKnow
Timer bars for buffs, debuffs, cooldowns, etc.
Wrath of the Lich King 
Mists of Pandaria 
The Burning Crusade Addon Details
Expansion
Categories
Developers
Having issues?
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.
Download NeedToKnow
More addons for Wrath of the Lich King
Discover other addons that might interest you
Modern Mouse Over
Macro generator for perfect mouseover casting. Automatically adds macro to hotbar. (For 3.3.5 pservers)
CoolLine
Shows cooldowns on a single bar.
RuneHero
The ultimate Death Knight runic experience.
DoTimer
Displays duration timers for DoTs/HoTs, cooldowns, and your buffs/debuffs.
Peace and Quiet
Automatically leaves the global channels when inside an instance/raid and restores them when exited.
SpellID
Adds IDs to the ingame tooltips.
UberInventory
UberInventory lets you view your bags, bank and mailbox at all items.
BiS-Tooltip – Stormforge Frostmourne
Backport of BiS-Tooltip for Wrath of the Lich King 3.3.5a