WowAce

EUF is an enhance of wow original unit frames, provides hp with both value and %, and optional 3D portrait. Simple and Useful.

MaxStats

Adds resurrection, resurrected and soulstone status to Grid2. Uses LibResComm-1.0

FuBar_KungFu

Test whether the player can really dispell a buff or debuff, given its talents.

A death track window for Recount

xchar

Assistance to the dance during Dread Spray

Dropin replacement library for SetBackDrop

SpellWatch

A 'channeling spell'-tracking addon for Affliction Warlocks. Drain Soul, Drain Life/Harvest Life and Malefic Grasp.

LDB Broker launcher for HealBot

Adds pipes which can control arbitary other statuses (like toggle status on key or "in combat"-state).

Outdated! Please use 'XLoot', available on Curse and WoWI

Helps you automate selling stuff

Lexan

LFD status via a DataBroker display rather than the minimap.

Sneakily inspect how much gold your mouseover target has made so far.

Parkour puzzles throughout the world.

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