WowAce

Library for tracking mouse gestures

Expiration

Replacement for the default minimap.

BanzaiLib

Manages the SavedVariables of your addon with a layered hierarchy of settings.

Adds pipes which can control arbitary other statuses (like toggle status on key or "in combat"-state).

Assist you with faction transfers letting you know which mounts, spells, etc you have and what they will be swapped to.

Customize the PlayerPowerBarAlt display

wRlog

This addon helps with daily quests.

Automatically equip 'Chef's Hat' if the Chef enters the kitchen (Cooking TradeSkill).

Display combo points for Arcane Blast debuffs

A Data Broker plugin to show AddOn memory usage.

Shows optimal target to use various area healing spells

Ghost: Pulse

Notifies you of experience gains

Enhances the StackSplitFrame with numbered Buttons, a '1-Click Mode' and a 'Auto Split Mode'.

FuriousTask

A 'channeling spell'-tracking addon for Affliction Warlocks. Drain Soul, Drain Life/Harvest Life and Malefic Grasp.

SmartyCat