WowAce

For Developers (of Addons which uses LibWho-2.0): show queues and queries in realtime

Tracks your keystones

IncomingHealsLib

A threat main view module for Recount

Provides data about all artifacts in the player's possession.

Simple and rich Death Knight rune customizations

A library to track nameplates.

Guilder brings common guild-raid tasks together in one convenient place.

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

Loot Distribution System

This will keep track of how much you have paid per item in your inventory. Only one of (Auctionator, Auctioneer, AuctionLite,...

Adds a button to your character and inspect window that shows a summary of gear enchants and gems.

Note + rep tracking for players, with guild data sharing.

Control screenshot format and quality via LDB displays

InventoryLib

Square Minimap and more

Enhancer

Instant PROC notification

Rewrite myBindings. An enhanced key bindings interface.

Allows you to prevent addons from sending and receiving messages.