WowAce

Open those pesky lockboxes

Various libraries based on LCD4Linux, offering users lower-level UI customizations.

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

Auto and random summon highly customizable for your pets and mounts, with Data Broker support.

A library to get currencies' related information

In-game EPGP guild helper, supports standby, main/alt shared pools, minEP, offpecGP. Fixed price list with progress multiplier.

Cartographer_Treasure

Keeps track of performance of memory, latency, and framerate.

Manufac

Incubator

Broker plugin to display player orientation

Shows Status Bars that you can drag around and group up for your cooldowns

Detects specific CDs and spellcasts

Open inventory items with 1 button

Nvp

InfiniBar-2.0

Load manager for AddOns

Better quest log and tracker

Database of Diminishing return categories and general data

Manages tracking of raid attendance, loot, and more.