WowAce

Display the global cooldown around your cursor. (+ other stuff)

ArenaPointer

Eliminates the spam from the chatframe and sums it up in a broker plugin.

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

Open those clams (and other containers)

Announces results of readychecks to the raid/party, installs "/rc" alias, shows rc timer bar

Options for TinyTip

Cartographer_Routes

Adds four icon indicators to Grid (top, bottom, left and right).

RaidAgent

Library to help with querying unit talents.

Relog

Timerbar embeddable library

TouristLib

Raid level alternative player power warning (Atramedes, Cho'gall, Lord Rhyolith)

Automates bites during the Blood-Queen Lana'thel encounter in Icecrown Citadel

What did you just loot?

ColaLight

Fancy up the ExtraActionButton frame

Combat Alert