WowAce

Transcendence Monitor for Monks

Makes grid QuickHealth aware

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

Embeddable library to track raid/party roster

SmartyCat

FuBar_PetFu

Records mail when visiting the mailbox to make keeping track of mail and expiration dates easy.

Lists Pots and Herbs you got on all chars and allows you to specify color coding

Mutes Annoying Sounds

Track of your tradeskills across characters, create small buttons for them and track cooldowns.

FuBar_AlchemyFu

Displays the time until the next battle and more.

Display combo points for Arcane Blast debuffs

Interface-central mount management

GirlFriend

Dynamically atering layout in raid environment (Tanks, Ranged / Melee DPS, Healers)

InstanceMaps

Puts a timer in /yell when you get Unbound Plague during the Heroic Professor Putricide encounter

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

RaidInfo