WowAce

Mission UI tweaks

SnapshotBar

Reduces achievement spam when a group of people earn the same achievement.

An in-game list of all hunter pet families and their abilities.

LibCooldown-1.0

Winded

Show a bar indicating the unit's power that can change color based on value.

Two-way radio functionality for IC communication

Tracks your crits.

Extended math library for Lua

Advanced features for sRaidFrames

TrafficJam

Provides cooldown timers for abilities you want to track

Recount2

AssignAssist

A simple, standalone Resurrection Monitor

Shows the source of an item as a tooltip

Addon for priority management of combat skills for all classes

Adds the ability to send mass mails to guild ranks.

Automatically calls ForecQuit() right before you are AFK-disconnected to quit wow instead of going to the character selection...