WowAce

MainAssist

Allows the user to customize the the tooltip with lua-scripts

Swiss Army knife for instances, including player tracking, ignore buttons, loot tracking, notes, and more.

Fixes UI bugs

tekSupport

Simple display and management of Away / AFK / Busy / DND status via broker or minimap

Prompts for canceling of pet battles if no rare pet is found in the opposing team.

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

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

Adds your name to chat messages

FuBar_SoulJarFu

Adds the "pixel perfect" font "Silkscreen" to LibSharedMedia

Friends & Guild Data Broker plugin.

Buffalo2

Adds on-screen buttons for the farming tools and seeds.

Vengeance module for Broker displays.

StitchUI

Allows you to prevent addons from sending and receiving messages.

Show where the chests are for Withered Army Training

FuBar_RecapFu