WowAce

Creates virtual cyphered chat channels over guild addon communication channel.

Toggles WoW to the forground on events.

A simple interface for unitframe click casting.

Displays friend notes in unit tooltips, at logon, and in /who results.

Litmus

Replacement for default bags.

Tools for MultiBoxers or Group questing/leveling

Makes the Blizzard options frame movable and resizable

SpyGnome

Highly-configurable shield / absorb tracker.

Speed plugin for any DataBroker display.

Provides LibPeriodicTable-3.1 item filters for AdiBags.

DataBroker display using minimap buttons.

Add-on that shows which battle pets can be farmed this week

Lightweight time/date display with optional hourly chime.

Configuration library

RoleCall allows you to easily see the talent specs and roles of everyone in your group.

OneBag is a replacement for the default game bags that combines all the bags into one frame.

Alternate Rune Display

Aspect checker addon for Hunters.