WowAce

Raid loot tracking and text generation

Simple search inspired by vBagnon

Skills plugin for any DataBroker display.

Tweak the tradeskill windows

A fountain of fonts for your funktastic UI.

AutoGratz

Automatically switches Profiles of addons when changing spec

Allows the user to customize the the tooltip with lua-scripts

Shows the duration of the most recent (or current) combat

Crowd-control monitor

Status indicator that shows the remaining of value of Powerword shield.

"Range finder/display for Discipline's Holy Nova"

Adds tooltip for debuffs (and other things? you found out: no).

Shows where the equipment of inspected users or yourself is from.

Continously scan for addons using excessive CPU - especially bursts

Makes most default frames movable (mailbox, achievements window etc.)

Kenzo is a skin for Masque

Monk Brewmaster/WindWalker Priority and Buff/Debuff Tracking Tool

Resolve module for Broker displays.

Simple quest item bar.