WowAce

Shows you the radius of your totems.

Keeps track of time played and rested XP across your characters.

RicoMiniMap

Animated target indicator

Threat-2.0

Automatically and immediately cancels all in-game cinematics and movies

DaHud

Raid loot tracking and text generation

A simple slash-command-based addon for querying item information from the Blizzard servers via ItemIDs and SpellIDs.

Sheppard

FuBar_FuXPFu

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

Keeps track of space left in your bags.

Review any raid or party members recent incoming combat along with health level.

LDB data source for currency flow

Guilder brings common guild-raid tasks together in one convenient place.

Tracks SendAddonMessage Spam

Regain that wasted space!

A FuBar plugin to show Recount.

A library to track nameplates.