WowAce

Displays a grid of guild ranks versus permissions.

opens/closes all bags when at merchant (instead of only the backpack)

Displays events from Calendar for upcoming week in tooltip.

Allows you to create icons, which can be customized greatly by user's input. CiR is more than just the usual cooldown tracker.

Helps to find other player's alts.

Recap

PiraPlex

LDB Broker launcher for HealBot

A simple addon that warns you if your pet isn't attacking while you're in combat.

Addon management panel extreme release edition

Displays a reliable cooldown timer for the Shaman Ascendance ability

Dedicated to Lazybones of EU Khadgar who had the original idea as he can't find a damn thing in his bags. You're a great guy...

Shows you which bosses you've killed next to the raid finder frame.

Hitman

GotWood

Detox

Utilities for pixel perfection, decimal to hex, parsing item strings

SmartyCat

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

BanzaiLib