WowAce

HUD that you can tweak the way you want.

Search, filter and craft gems in the game!

Adds two icon indicators to each corner (total: 8 icon indicators).

A Mount and Companion manager

RBM

Keeps track of time played and rested XP across your characters.

AceBuffGroups

Dynamically atering layout in raid environment (Tanks, Ranged / Melee DPS, Healers)

Replacement for default bags.

Keeps track of gold and cash flow across multiple characters

Automagical macros for each talent tier.

RaidSpy

Scans your Equipment for cumulative item bonuses and sums them up.

Simple display and management of Away / AFK / Busy / DND status via broker or minimap

BananaBar2

Gives a score for your kit allowing easy comparison with others, also colour codes kit based on appropriateness for your level.

Rewrite myBindings. An enhanced key bindings interface.

Acolyte2

Adds achievement reminders to BigWigs

Objective Tracker