WowAce

Tells you if you're buffed

Max Camera

Bind spells, items, and macros to keys, without using action buttons

Omnibus

Friends list improvements: notes, remembering the information of offline friends, friend list syncing and backups, and a fuba...

Provide plenty of links

FuBar_AnkhTimerFu

Shows where the equipment of inspected users or yourself is from.

an embeddable library providing an abstraction layer for tracking and querying Blizzard's Nameplate frames with ease and effi...

A library to help with localization of item types and subtypes.

A library for PvP and Battlegrounds

Kiwi Plates

A simplistic clock.

An auction house AddOn to make the life of each fence easier.

Mutes various chat related annoyances while in capital cities and instances.

A library to help with localization of Zones.

Improved Questing Experience

Fires events whenever a raid member "fails."

View bank, inventory, mail, equipped and guild bank contents from any character anywhere!

Simple Spell Alert