WowAce

ClosetGnome_Mount

Meeuuuh

Keeps track of resurrection spells cast in a group

FuBar_PetInFu

Mana Regeneration Information

BiGOpt

Crowd-control monitor

HunterAEP

Provides the ability to suppress specific spellcasts like "Deaden" from your casting bars.

Monitors for friendly deaths and announces them as in Myth: The Fallen Lords

Swiss Army knife for instances, including player tracking, ignore buttons, loot tracking, notes, and more.

A simple addon that warns you if your pet isn't attacking while you're in combat.

Profiler of the Lords of the Zodiac guild.

Adds 3 indicators to each side (top, bottom, left and right).

Depot

FuBar_UIReloadFu

Adds a confirmation dialog when crafting Bind-On-Pickup trade skill items

SanityItemCache

Simple, nice-looking power bar addon for all classes.

Library to help with querying unit talents.