WowAce

Smooth combat HUD based on ArcHUD2

Adds the toon name to the alert that your RealID friend has come online.

Omniscience

TrapBar

Shows a money overview for your current realm in the tooltip on the money in your bags

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

HealComm-2.0

FuBar_TinyPadFu

A simple, zero config, trash item seller

Assistance to the dance during Dread Spray

FuBar_GemWatchFu

Shows guild and system message of the day only if either one of them has changed since the last login.

Provides the ability to suppress specific spellcasts like "Deaden" from your casting bars.

Restores channels and channel-window associations after disconnects remove them.

LCDs for WoW

Allow rule based automatic rolling on loot.

Bars showing amount of buffstacks

LDB data source displaying rested XP for whole account

Displays an alert whenever you loot an item for the first time.

Plays amusing sounds whenever you skin a mob