WowAce

Show a rough range indicator

Enables you to see Chinese, Japanese and other languages in game

Assist you with faction transfers letting you know which mounts, spells, etc you have and what they will be swapped to.

GridAlert

Reputation Statistics - Gained, Needed, Rep/Hr, Session Time, etc.

BanzaiLib

kgPanelsConfig

Small addon to copy chat lines.

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

"Shows Call To Arms status in an LDB data provider."

TalentWhisper

Shows missing buffs and handles welfare and deluxe buffs as one (motw/gotw, blessings, etc.). This lets you see when you nee...

Keeps track of space left in your bags.

A FPS Data Broker plugin.

Shows the price of a single item in the Auction House.

Keeps track of durability and pops up a dialog to repair when you go to a vendor who can.

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

Database of your death locations for HandyNotes

Provides extended aura status settings.

Armored man and paper doll durability modifier