WowAce

Gathers statistics on certain chance-on-use spells, also known as procs.

EnvenomX

Tracks whispers and conversations

Allows you to prevent addons from sending and receiving messages.

EQCompare

Provides more visible access to dungeon and raid difficulty settings via FuBar.

Does a /who search of multiple dungeons.

Vengeance module for Broker displays.

rSelfCast

Prompts for canceling of pet battles if no rare pet is found in the opposing team.

ChatHighlighter

PerfectTargets

Database of FlightMaster locations for HandyNotes

CombatAnnounce

Raid loot system.

Complain about crowd control breaks.

A simple range indicator for optimizing Halo damage.

WeaponRebuff

Provides information of tradeskill and crafting materials that are in the banks and bags of your characters.

On login, displays changes to your guild since the last time you logged in.