WowAce

Allows for easy congratulating when someone earns an achievement.

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

Displays bars depending on your professions

FuBar_ModMenuTuFu

Allows movement and scaling of class-specific resource displays

A Perl layout with oUF.

Percent

Used to visualize and change values of variables/variable-trees in game

A FPS Data Broker plugin.

EUF is an enhance of wow original unit frames, provides hp with both value and %, and optional 3D portrait. Simple and Useful.

Control screenshot format and quality via LDB displays

Debuff Monitor: A Powerful & Configurable Raiding Tool

Adds four icon indicators to Grid (top, bottom, left and right).

Stable

Adds aura indicators to unit frames

Shows a nice Soulstone Monitor.

Shows you which bosses you've killed next to the raid finder frame.

ArenaPointer

ERP

A loot distribution addon meant to improve master looting during raids.