WowAce

Considers an item against all the items you have to determine whether or not it is an upgrade

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

A tool to appraise, estimate, or judge your equipment against the equipment of others.

CharScanner scans Basic Character Data, Talent Specifications, Equipment, PvE/PvP Achievements, PvE Boss Kill Statistics and ...

Don't underestimate your little critters!

Status indicator that shows the remaining of value of Powerword shield.

Creates a broker plugin for all your broker launchers

HunterAEP

Aspect checker addon for Hunters.

GearRating

Save and load macros.

Lets you drag UI frames around

MiniPet, Always keep your little companion with you, based on the work of Carra.

Quest helping: fetching items to use, that sort of thing.

CCBreaker

SmartyCatManaBar

Allows you to prevent addons from sending and receiving messages.

A simple range indicator for optimizing Halo damage.

Adds a couple of graph displays to Skada.

EQCompare