WowAce

Auto sizes frame layout depending on group/raid size or predefined zone data

Draws 3D portraits for main units that can be moved or resized at will.

DaedUI skin for Masque.

Don't accidentally solo queue BGs when in a group!

Adds a bar showing the global cooldown

AllYouCanEat shows information about the following statistics: beverages, foods, bandage types, potions, elixirs and flasks.

Adds statuses to grid for best targets for smart heals.

Tooltip text modiffier based on DogTag.

Allows shorter slash command handling

AltClick an item in your bag to add it a mail, auction, or trade frame, and alt-click to buy a stack if reagents.

Save and load macros.

Library that provides a timestamp that is equal across clients' timezones and system clocks

Announce which globule to kill during the Yor'sahj the Unsleeping encounter.

Adds a status to Grid for debuffs applied by Raid Bosses.

A library to track nameplates.

Keeps track of time played and rested XP across your characters.

Keeps track of current money and all your characters on one realm.

Makes out-of-range buttons red. Super efficiently!

Buff and debuff timers with bars or icons.

Adds an inobtrusive circular castbar around the mousecursor, handy for Clique users