WowAce

Powerleveling guide framework

Configuration library

Good looking, smoothy and helpful nameplates

Fires events whenever a raid member "fails."

Raid Frames using the oUF framework.

Enables user defined sounds for Party, Guild, Raid and Custom Channel chat messages.

Creates virtual cyphered chat channels over guild addon communication channel.

Healer gear benchmark

Displays the time remaining before your (temporary) pet is dismissed.

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

Volume control panel.

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

Manages the SavedVariables of your addon with a layered hierarchy of settings.

Death reports

Considers an item against all the items you have to determine whether or not it is an upgrade

WhoDrop

HunterAEP

Allows you to prevent addons from sending and receiving messages.

FuBar_RegenFu

Guilder brings common guild-raid tasks together in one convenient place.