WowAce

Provides database of quest giving npcs/mobs/objects for display on the World Map/Minimap

Adds resurrection and soulstone status to Grid, using LibResComm-1.0.

LibDogTag-2.0

XP and Reputation bars

Check the consumable usage of your raid

Cartographer_Herbalism

LibBabble-Spell-3.0

Keeps track of healing spells cast by everyone in a group.

PerfectTargets

Display the global cooldown around your cursor. (+ other stuff)

Uses guild notes to add alts' main names to chat windows and other places

Visual Raid Cooldown Tracking

SanityItemCache

Gives detailed descriptions of particular localities, as zones or instances, and provides optional TomTom integration.

Fixes UI bugs

Don't underestimate your little critters!

A Data Broker display for combat statistics.

Raid level alternative player power warning (Atramedes, Cho'gall, Lord Rhyolith)

AltClick an item in your bag to add it a mail, auction, or trade frame, and alt-click to buy a stack if reagents.

Shows current/dot cast haste values