WowAce

Pins on the World Map for quests you have not completed yet

Keeps track of space left in your bags.

Tracks the current Fear Ward's in the raid or party.

Adds Archaeology items to AdiBags virtual groups

Loot Distribution System

Combination of Titan LootType and Roll - stripped down and cleaned up.

Proximo

LDB data source for currency flow

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

Easily mail friends, guild members, alts and others

Adds manabars to the sides of Grid frames.

Animated target indicator

Auto and random summon highly customizable for your pets and mounts, with Data Broker support.

Enhancer

Better quest log and tracker

New/Old BG indicator, Join by ID, Quick Leave Queue, etc.

HUD that you can tweak the way you want.

A simple slash-command-based addon for querying item information from the Blizzard servers via ItemIDs and SpellIDs.

KillingSpree

ClosetGnome_Switcher