WowAce

Shows you a much bigger icon selection frame

Achievements

AceBuffGroups

Shows simple Buttons for your Cooldowns :)

Marks the locations of Midsummer Fire Festival bonfires on the worldmap and minimap.

One large inventory.

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Adds mob patrol paths to your map.

Keeps track of your current location.

Quest History tracker and shows lists of quests in each category

An extension to the default WoW Unit Frames.

Automated smart raid marking to speed up trash clearing in instance runs

Displays online friends.

DKP system for all guilds in the Banana Republic.

Acolyte2

Displays the remaing cooldown of the action you tried to use

A Friend-Enemy-Unit-Frame for battlegrounds.

FuBar_WindFuryFu

Collects Herbs, Mines, Gas Clouds and Fishing locations and adds them to the worldmap and minimap

Apathy skin for Masque.