WowAce

A library that tells wether a item is a quest item or not (equipped or in bags)

TextSpy

Stable

Shows more recipies in the profession window.

A customizable buff/debuff display replacement for the default Blizzard frames (with right click cancelaura support).

Protractor

Pet Battle Lite Frame

This addon helps us track Renewing Mist and Uplift for Mistweavers.

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

Hitman

RBM_AbilityWatch

Records mail when visiting the mailbox to make keeping track of mail and expiration dates easy.

A library to help with localization of Archaeology artifacts

RapidCast

Raid target control and instance shortcuts for Broker

Raid tracker for Asmodeus

A simple Fubar plugin for Cartographer_Routes to quickly show/hide routes in the current zone

Adds Buff/Debuff icons to the grid frame.

Gives equipped and overall iLvl to indicate the quality of a character's gear.

Bars showing amount of buffstacks