WowAce

Shared handling of media data (fonts, sounds, textures, ...) between addons.

Announces Mage Spells in chat.

Shows the health of the player's current bodyguard.

Tracks profession specific cooldowns and items across all your characters

IFrameManager

Allows you to browse your clients database

Fubar_ChannelWatchFu remade for Broker

Save and load macros.

Collects, analyzes and presents information about the virtual economy.

SysMon plugin for any DataBroker display.

AceBuffGroups

Speed plugin for any DataBroker display.

XArt

Shows your standings with the factions.

Outdated! Please use 'XLoot', available on Curse and WoWI

Battleground Timers in a HUD around the Blizzard BG status

Simple, light-weight, LDB-enabled timer that tracks how long you spend in combat

Speeds up triggering actions such as items or spells by triggering them on key/mouse down rather than release

Allows you to create icons, which can be customized greatly by user's input. CiR is more than just the usual cooldown tracker.

Makes your item stats shine!