WowAce

Display an informational fighter jet style HUD while flying or riding

Tracks vulnerability debuffs on multiple mobs

Auto and random summon highly customizable for your pets and mounts, with Data Broker support.

Keeps track of your reagents for buffing.

Raid Frames using the oUF framework.

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

Keeps track of HoTs, DoTs, Buffs and Cooldowns. With audio and text alerts to refresh them.

Easily mail friends, guild members, alts and others

Quickly see what counter-combinations your epic followers cover and which ones are likely to get a new combination when rerol...

A full package of auras for all 3 Shaman specializations

Simple library that handles multiple levels of logging.

Adds manabars to the sides of Grid frames.

Loot Distribution System

FlexBar2

Babble-2.2

Role playing AddOn that shows extra information about characters as entered by the player.

Tracks interrupts

MobHealth

FuBar_RegenFu

LilSparky's Workshop mod for Trade Skills