WowAce

Write event handlers in a simple GUI in-game

CVarEditor

Envenomous

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

Logs hunter's use of Feign Death

Displays a table for possible outcomes of incoming hits with their probability

Addon to manage WoW titles.

AssignAssist

FuBar2

Show a bar indicating the unit's Burning Embers count.

Standalone LibUnitID, with runtime diagnostic utilities

A library to provide unobtrusive notifications.

Tools to easily compare gear among party members.

QuoteNoMore

Keeps an eye on someone's distance from you, and alerts you if they get too far.

Baggins_ClosetGnome

Not required if you already have TinyTip, as this is a basic TinyTip module. Allows you to reposition the tooltip, smart repo...

Tooltip text modiffier based on DogTag.

DKPmon_BossAuction

WhisperBid