WowAce

Tracks SendAddonMessage Spam

SacredBuff

Adds predicted lists for spells while the user types

GotWood

Shows skills in a tooltip and allow them to be used. Also keeps track of Cooldowns.

Regain that wasted space!

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

Dims action buttons.

Keeps track of space left in your bags.

FuBar_VampwatchFu

Keeps track of space left in your bags.

Tracks vulnerability debuffs on multiple mobs

Shows mana usage as a percentage in a spells tooltip.

Separate indicator for your HoTs with timer.

KC_Items

Allows you to preview weapon glow in Dressing Room.

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Adds two icon indicators to each corner (total: 8 icon indicators).

LilSparky's Workshop mod for Trade Skills

Dynamic item DKP calculation