WowAce

HUD that you can tweak the way you want.

Reduces interface tedium by doing the little things for you.

Prompts for canceling of pet battles if no rare pet is found in the opposing team.

LDB data source for Combat Tracking

FuBar_ItemBonusesFu

Tracks skill and tradeskill costs and progressions, as well as trainer locations.

PetBar

Calculates incoming damage avoidance and mitigation

Simple and rich Death Knight rune customizations

NameTagToggle

FuBar_MonkeyQuestFu

LDB display of currencies, gold totals and session / daily / weekly statistics for all characters on a server.

ItemBonusLib

A library to help with localization of Archeology dig sites

Tells you if you're buffed

Instant PROC notification

PT3Bar

A jukebox for playing wow embedded music.

tracks and share quests between your party

Shows your standings with the factions.