WowAce

Puts a timer in /yell when you get Unbound Plague during the Heroic Professor Putricide encounter

Simple and clean Death Knight displays

Shows learned recipes of all characters.

Leveling guides for trade skill professions.

Accelerates Camera Zooming

Adds pipes which can control arbitary other statuses (like toggle status on key or "in combat"-state).

Displays classes and specialisation dependent stat priorities provided by icy-veins.com

Angry Boss Reminders helps raiders switch to the proper talents, glyphs, and gear for each boss during a raid.

Helps you see the Halion's Corporeality during phase 3

opens/closes all bags when at merchant (instead of only the backpack)

Keeps track of time played and rested XP across your characters.

Automatically leaves the global channels when inside an instance/raid and restores them when exited.

Shows who controls Wintergrasp and the time until the next battle.

A library to help with localization of Archeology dig sites

Libary for cleanly inspecting other players

FuBar_WhisperFu

Eliminates the spam from the chatframe and sums it up in a broker plugin.

A library to help with localization of classes.

Customize the appearance of the chat bubbles.

Provides quick notification (sound and visual) of your tanking status of your current target. Meant for tanking.