WowAce

mHud

Simple and rich Death Knight rune customizations

Hook extra menu to friend list, guild list and chat player

Shows your standings with the factions.

TextSpy

Automatically sells low quality gray items and selected white items to the vendor.

FuBar_uGuild

KillingSpree

Shows a circle on the minimap to indicate spell range

Should I send that recipe to my alt?

Keeps track of healing spells cast by everyone in a group.

FuBar_SWStats2Fu

FuBarPlugin-2.0

A library to handle rearrangement of blizzard's frames when bars are added to the sides of the screen.

Library for tracking cooldowns of other players

PerfectTargets

mDarkPact

Automatically generate and announce optimal spirit totem assignments during the Gara'jal encounter in Mogu'shan Vaults.

Embeddable chat throttling library with traffic shaping and priorities

Provides quick notification (sound and visual) of your tanking status of your current target. Meant for tanking.