WowAce

Speeds up triggering actions such as items or spells by triggering them on key/mouse down rather than release

Note + rep tracking for players, with guild data sharing.

Watch tooltip updates to announce when you find specific objects

Display and change minimap tracking modes from your FuBar.

Sets the DND flag, when are in combat.

Dailies Quest Tracker

Quest information

Opens professions and shows their skill level.

HiveMind

Parkour puzzles throughout the world.

A frame designed for each specialization of druid's watching their main power and important buffs/debuffs

Automatically invites player from templates.

WeaponRebuff

RaidAgent

Improved Quest Tracker

Embeddable chat throttling library with traffic shaping and priorities

BossWhisperer

HazLoot

A fully featured library tracking all ongoing absorb effects

Splut