WowAce

Simple embeddable publish-subscribe implementation.

Shows the group leader, raid assistants, and master looter in Grid.

FuBar_IOPFu

Cartographer_Trainers

Broker2FuBar

Retooled Professions

Mob respawn timers

Shows at-a-glance what raid buffs/debuffs you have.

Complete Replacement for Inventory and Bank Bags.

GemList

MAcon

A module that lets you find out what today's dailies are without having to visit the quest givers.

Provides the the health and target of by an unit targeted mob (meant to be used for tanks).

Interface for addons to include extra information on the GuildMemberInfo frame.

Keeps track of honor, PvP statistics, BG Marks, and Arena points.

StarVisuals displays various data visualizations

Zone text Data Broker plugin.

Displays Currencies as a Data Broker source

Notifies you of new calendar event invites and reminds of upcoming events on all characters and realms

FuBar_ToFu