WowAce

Notifies you when you get aggro.

Customize the PlayerPowerBarAlt display

Notifies you of new calendar event invites and reminds of upcoming events on all characters and realms

Adds Blizzard, oRA2, oRA3, CT_RA MainTank or Dungeon Finder Tank icon (shield or MT, 1, 2 ... 10) or text (MT or MT1, MT2 ......

AuctionSort

Adds unreal tournament style sounds to PvP encounters.

Monitors the combatlog identifying players from the oposite faction near you.

Display fails based on EnsidiaFails filtering options in Skada

Notifies the raid when someone is Dazed.

Good looking, smoothy and helpful nameplates

Cartographer_ExtractGas

OneStorage

Paparazzi

An attempt at giving a complete overview of Arena battles

Announces results of readychecks to the raid/party, installs "/rc" alias, shows rc timer bar

Automatically sends guild recruitment ads to the GuildRecruitment channel.

TrainingWheels

Darkness

A texture browser for developers and UI modders

Simple loot specialisation display with selection in tooltip.