WowAce

Melee stats Data Broker plugin.

VendorSearch adds search features when buying items from any vendor

LFD status via a DataBroker display rather than the minimap.

Display who did the Worship interrupting on Chogall

Filters unimportant Buffs.

Automatically switches Profiles of addons when changing spec

Durability Data Broker plugin.

oUF Layout

Puts a timer in /yell when you get Unbound Plague during the Heroic Professor Putricide encounter

Auto equip/take off a selected tabard on entering/leaving an instance.

AntiInvite

Allows you to loot BoP items without prompting when not in a group or raid

Adds a simple percentage threat status to Grid.

Skills plugin for any DataBroker display.

Custom minimalistic nameplates

Simple enhancements to the mission list.

Adds AFK status to Grid frames.

EBB-inspired buff bars with click-to-remove support

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

Write event handlers in a simple GUI in-game