WowAce

Uses TomTom to show target location if target is in party or raid.

Creates parameterized AceGUI-3.0 editboxes with autocompletion

Adds TargetIcon status to Grid2 (player / player-target).

ObliviousDKP

SpellEventsLib

Random pet summoner

Tracks and reports party rolls

Tacticial pet battle information so you can be a Pokemon master

Show helper indicators for units conditions (buffs, states, etc).

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

UIThing

Adds LuaTexts text formatting to Grid2 statuses.

Provides accurate, millisecond-level timing.

With Mists of Pandaria Blizzard publish all characters from an account unless you disable that 'feature'. This addon warns you.

Displays an animated bar with next enemy swings

Simple item compare tooltips

A library to provide tools for formatting money and time.

Make the unit frame fade if out of range.

Corrects unspecified mod sounds to use the Master channel.

Buff and debuff timers with bars or icons.