WowAce

Shows skills in a tooltip and allow them to be used. Also keeps track of Cooldowns.

FuBar_TrainerFu

Show item durability and quality in the character frame.

FuBar_InnboundFu

manipulate the minimap in numerous ways; move, scale, skin.

MiniPet, Always keep your little companion with you, based on the work of Carra.

QuestLog

Detox

Friends list improvements: notes, remembering the information of offline friends, friend list syncing and backups, and a fuba...

TuiRaidTracker

Incoming Heals

Reduces interface tedium by doing the little things for you.

DaHud

Smart mount randomization on a button! Empty coconut halves not included.

Target Debuff monitor. Stacking aware, giving current and potential debuff status.

Displays the remaing cooldown of the action you tried to use

One large inventory.

Antagonist

Shows Status Bars that you can drag around and group up for your cooldowns

Dynamic item DKP calculation