WowAce

fixes the issue with InterfaceOptionsFrame_OpenToCategory not actually opening the Category (and not even scrolling to it)

InterfaceOptionsOptions

Simple addon that tracks internal cooldowns.

Adds cooldown timers to your trinket procs

A standalone (using the stopwatch) or plug-in for DBM which displays the duration of interrupts on incoming or outgoing spell-tree lockouts.

Tracks interrupts

Helps with interrupt notifications and announcements.

One large inventory.

Add item levels to Inventorian

A menu with useful searches for Inventorian

InventoryLib

Gives a score for your kit allowing easy comparison with others, also colour codes kit based on appropriateness for your level.

This is an add-on to block incoming guild/party/duel requests (except for friends/party/guild) (previously ASSBlock)

Fix for Isle of Conquest icons that are bugged in 3.3.0.

An extra set of 11x3 buttons, integrated into the default action bar.

Additional Action Bar Buttons

Shows ItemLevel Quotient in the Character and Inspect Frame.

iTargetingFrames

item2phpBB

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