WowAce

Adds Buff/Debuff icons to the grid frame.

SpoilsOfWar

Watch tooltip updates to announce when you find specific objects

ChatStamp

Unit testing framework for World of Warcraft addon development.

A money data broker plugin.

Adds Name and Buyout Price sort columns to the auction house.

SEasyRotation

Selectively loots your fishing catches.

Reputation tweaking module for TweakHub with auto watched faction selection and detailed rep info updates.

Diplomat

Show a bar indicating the attack power gained from Vengeance.

Broker_CalendarEvents

A customizable buff/debuff display replacement for the default Blizzard frames (with right click cancelaura support).

Zone text Data Broker plugin.

Scrub

Thok Cooldown Rotation

Buff and debuff timers with bars or icons.

Pet feeder, called by "/click FeedItButton" from a macro.

A collection management library similar to .NET's System.Linq