WowAce

Really very early stage. No, earlier than that.

Fancy up the PlayerPowerBarAlt frame

Aggro Warning System for Parties and Raids.

Automatically switches Profiles of addons when changing spec

ArenaHistory

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

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

Simple money display for LDB

A raid buff tracker

SpoilsOfWar

Shows the spec of people around you in the tooltip.

Adds a third text indicator to Grid.

TMrecruit

Customize the appearance of the chat bubbles.

A Latency Data Broker plugin.

Data broker for keeping track of your Ankh cooldown.

SVG Render-bender

RefillRemind

Automatically and immediately cancels all in-game cinematics and movies

KivinLootzor