WowAce

Adds indicators to the sides of Grid frames.

PreferredItems

It's a doodle pad for doodling with doodles.

Posts a BigBrother-QuickCheck to the raid-channel when a readycheck is started

Communicates with guild members for their positions on the world map

LDB data source displaying rested XP for whole account

rSelfCast

FuBar_CombatTimeFu

Sets you to DND when you fight a boss, and some other crap.

Displays an alert whenever you loot an item for the first time.

FuBar_TinyPadFu

Adds a confirmation dialog when crafting Bind-On-Pickup trade skill items

Provides access to all teleporting spells and items on right click of minimap button.

Leveling guides for trade skill professions.

A fountain of fonts for your funktastic UI.

Niagara

Mob respawn timers

Reverse Engineering will drill down and search your tradeskills for their elements

EnvenomX

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