WowAce

Embeddable chat throttling library with traffic shaping and priorities

XP and Reputation bars

FuBar_AlarmClockFu

ArenaPointer

Calculates DKP based on Item Level

Combine

RaidAgent

A simple range indicator for optimizing Halo damage.

Shows who controls Wintergrasp and the time until the next battle.

Keeps track of gold and cash flow across multiple characters

What did you just loot?

ItemRackFu

FuBar_CharmsFu

Automates bites during the Blood-Queen Lana'thel encounter in Icecrown Citadel

Adds on-screen buttons for the farming tools and seeds.

Display the global cooldown around your cursor. (+ other stuff)

FuBar_CraftTimersFu

Eliminates the spam from the chatframe and sums it up in a broker plugin.

RBM

Speeds up triggering actions such as items or spells by triggering them on key/mouse down rather than release