WowAce

FuBar_TinyTipFu

It's a doodle pad for doodling with doodles.

LDB data source displaying rested XP for whole account

Warnings about tanking specific abilities

Visual loot monitor

DelMapa

A simple range indicator for optimizing Halo damage.

A clone of the FailBot mod. Announces raid member failures such as "Player1 fails at frogger"

Add-on that allows you to setup and quickly switch between different profiles of your action bars

PerfectTargets

Simple library that handles multiple levels of logging.

Shows activity for hidden ChatFrames by making their tabs flash.

Piece of mind by being one with your class.

Allows customisation of login/logout system messages.

Angry Raid Points Client

Auto sizes frame layout depending on group/raid size or predefined zone data

Draws some lovely 3D portraits in the standard Blizzard artwork.

Reminds you if your flask/elixir and/or Augmentation Rune and/orfood buff is about to expire or has expired

Augmented Virtual Reality. Draw and add markers in the 3d world.

NabuFiveSec