WowAce

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

Displays online guild mates.

SpyGnome

Aspect checker addon for Hunters.

Tells you if you're buffed

Rep2 displays a message, which shows how much reputation you gained, and how much is needed until the next standing.

Bind spells, items, and macros to keys, without using action buttons

Manages tracking of raid attendance, loot, and more.

Auto roll greed, need, pass or manually roll on items.

LDB data source displaying rested XP for whole account

mHud

Display an informational fighter jet style HUD while flying or riding

Display bag usage on each of your bag slots.

Mutt (Macro Update Target Tool) provides slash-commands that can patch the predefined targets in your macros.

Displays friend notes in unit tooltips, at logon, and in /who results.

GDKP gold run ledger

Niagara

Enhancer

A Data Broker display for combat statistics.

FuBar_MicroMenuFu