WowAce

OneChoice tries to help you reduce quest reward choices down to, ideally, one choice.

Instant SLAM! notification

Shows the spec of people around you in the tooltip.

Restores channels and channel-window associations after disconnects remove them.

Bind spells, items, and macros to keys, without using action buttons

Uses guild notes to add alts' main names to chat windows and other places

FuBar_OutfitterFu

MainAssist

Provide plenty of links

Display the global cooldown around your cursor. (+ other stuff)

Configuration for LibToast notifications.

BananaBar2

Helps you decide which ability to use next according to priority you set

Generate a macro with random mounts

Set the clicking action for Grid buttons

GonffBar

Makes your item stats shine!

A library for PvP and Battlegrounds

A filter tool for blizzards TradeSkillUI

Client for MagicDKP which handles standby calls and bidding on items.