WowAce

Numerical and graphical display of Combo Points and similar buffs/debuffs. Also tracks Holy Power and Soul Shards.

Unit frame addon using Ace3.

XP bar using Ace3.

AutoMagicly clicks though Daily Quests, and Turns them In.

Shaman totem bar

Archaeology Assistant

Am I locked out? - Displays all RaidIDs for all chars

Improved Questing Experience

Show the appearance of an item when you mouse over it

From bags we came, to bank we return

Keeps account of attendance and loot for raids, parties, bgs, arenas and solo for questing.

Checks Raid Buffs/Flasks/Consumables. Tunable alerts for misdirects, taunts, cc breakage, rez, dispel and interrupt

Display Cooldown Count of Spell Icon and Item

Adds various information based on PeriodicTable to item tooltips.

Enables multi-line/unlimited-length pasting of text or commands into WoW

Violation

StatLogicLib

Tooltip of awesomeness. Moo. It'll graze your pasture.

Rebuff yourself with the mousewheel.

Display auras on action buttons.