WowAce

Add in keybindings to place raid marks on mouseover, or the target if there is no unit being moused over

Status indicator that shows if a unit is hostile (probably mindcontrolled)

Mode7Test

Adds a third text indicator to Grid.

Allows communication to be shared across realm through Battle.net.

Display fails based on EnsidiaFails filtering options in Skada

Really very early stage. No, earlier than that.

Master Loot Menu replacement

Creates a broker plugin for all your broker launchers

TalentWhisper

PowerDisplay

Allows for gold tracking across multiple time frames

WFtotem

A Healing Assignment management addon

MouseLook

Addon management panel extreme release edition

A library to provide coloring tools.

Skills plugin for any DataBroker display.

SmartyCat

Keeps an eye on someone's distance from you, and alerts you if they get too far.