WowAce

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

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

Shows learned recipes of all characters.

Configuration library

ComboSounds

T_ItemInfo

Displays classes and specialisation dependent stat priorities provided by icy-veins.com

Smooth group roll frames

Cartographer_nnTrainers

Broker plugin to display player orientation

RotLatency keeps track of your reaction to cooldown expiration.

Utility library with shared functions and data for various addons by NeoTron.

Quickly assign the highest follower to each building or unassign all of them.

ColaLight

DHUD2

Provides the ability to suppress specific spellcasts like "Deaden" from your casting bars.

FuBar_FactionItemsFu

Open those clams (and other containers)

A library to get currencies' related information

InspectFix