WowAce

Tracks skill and tradeskill costs and progressions, as well as trainer locations.

Loot Distribution System

Tracks your keystones

Rewrite myBindings. An enhanced key bindings interface.

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

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

Tracks profession specific cooldowns and items across all your characters

Simple and rich Death Knight rune customizations

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

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

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

IncomingHealsLib

A threat main view module for Recount

InventoryLib

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

Control screenshot format and quality via LDB displays

Angry Raid Points Client

A library to track nameplates.

Enhancer

Instant PROC notification