WowAce

Omniscience

Tooltip scanning library.

Allows custom-triggered boss mod timers to be created

FuBar_ExperienceFu

FuBar_GemWatchFu

Handles the assignment, coordination, and announcement of many parts of the Lich King encounter in Icecrown Citadel.

NabuFiveSec

Lists and/or reminds people missing flasks or food buffs at every ready check.

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

Displays the zone level ranage of the zone you are in and also gives you a suggest zone and instances to be in.

TrickOrTreat

XP and Reputation bars

Interface-central mount management

Armored man and paper doll durability modifier

Show optimal path for artifact leveling

Adds cooldown timers to your trinket procs

Allows you to loot BoP items without prompting when not in a group or raid

FuBar_AEmotesFU

Group interrupt cooldown tracking.

MobHealth