WowAce

Aggro Warning System for Parties and Raids.

Reserve raider tracking for EPGP.

Unit testing framework for World of Warcraft addon development.

Resizes Blizzard raid frames, and adds additional options.

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

PowerPoint goodness for your addon

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

LDB data source displaying character stats

Rawrkitty

A simple, zero config, trash item seller

Uses linear regression and a log of hitpoint values to estimate how long a boss has left to die and reach execute range.

CompostLib

Enhances the Equipment Manager to let you control the helm/cloak visibility for each set.

Action button layout and configuration

GirlFriend

Spy on your guild.

Never forget which one in that 5-mob pull casts what spell again.

FuBar_FromAViewToAKillFu

Checklist2

GoldenRun