WowAce

SpellWatch

Protractor

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

Allows combined aura detection. motw + gotw, all 4 mage int buffs, etc. in one status.

Changes the nameplates range and disables clamping to screen

It's a doodle pad for doodling with doodles.

Adds tier set number and difficulty indicators to tier item tooltips.

Cartographer_Mining

A simple addon that warns you if your pet isn't attacking while you're in combat.

IncomingHealsLib

Melee stats Data Broker plugin.

Shows a window displaying any raid member below 10,000 health during the Chimaeron encounter.

Simple oRA3 Maintank Target Frames, based on oUF

Tweak the tradeskill windows

A library to provide tools for formatting money and time.

Target assistance by automatic rewriting of macros

Shows a countdown bar for the duration of auras (e.g. HoTs, DoTs)

Cartographer_Mailboxes

Keeps an eye on someone's distance from you, and alerts you if they get too far.

KivinSpamGuard