WowAce

Monitors AP when dots are applied, clearly showing current vs applied AP levels.

A small datatext for ElvUI-using Shamans that gives them accurate info about their Reincarnation cooldown

Mark Worshipping player during the Cho'gall encounter

LootWhore

Relog

Addon for priority management of combat skills for all classes

LibMobHealth-4.0

Adds an inobtrusive circular castbar around the mousecursor, handy for Clique users

Automatically switch the hunter tracking based on the selected target

A raid buff tracker

Auto sizes frame layout depending on group/raid size

FuBar_HBFu

FuBar_DPS

Strips unwanted UI elemeents..

All Flight Masters, flight duration and more.

Invite lots of players in the raid browser for world boss groups

Makes most default frames movable (mailbox, achievements window etc.)

FuBar_jabberFu

Adds "line of sight" status to Grid (after the error occurs).

LD50_armor