WowAce

XArt

Replacement for WoW's flash/fade functions.

Automatically sells low quality gray items and selected white items to the vendor.

A seperate focus bar, with focus gain prediction and rotation forecast.

LibGUIFactory-1.0

FuBar_ModMenuTuFu

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

LFD status via a DataBroker display rather than the minimap.

RaidGroupNumber

JostleLib

OneChoice tries to help you reduce quest reward choices down to, ideally, one choice.

ActionCombat

Shows optimal target to use various area healing spells

Automatic ammo reloading and selection, with warnings.

Debuff Monitor: A Powerful & Configurable Raiding Tool

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

Provides the the health and target of by an unit targeted mob (meant to be used for tanks).

Menagerie

OneBag is a replacement for the default game bags that combines all the bags into one frame.

Display an arrow that points to a raid/party member anchored to raid frames