WowAce

Toggles WoW to the forground on events.

Tells you who bought your auctions.

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

Shows how many of an item a party member has crafted

Shows item level in inspect frame

Shows you the radius of your totems.

Send Messages encoded with the hexadecimal system

Allows raid leaders to view information on raid or guild member equipment information

Automatically set to a given set of gear when logging out

Displays an estimated swing timer for monsters

A boss encounter engine used by other add-ons

Allows custom-triggered boss mod timers to be created

Chooses the most expensive quest reward and vendors it when possible

Sneakily inspect how much gold your mouseover target has made so far.

A collection of Rogue modules.

LCDs for WoW

Yes, I really want to destroy that item, stop asking.

Sets you to DND when you fight a boss, and some other crap.

LDB display addon with one Blockoblock per plugin.

Adds a check box to toggle showing boss portrait buttons on the map