WowAce

Adds options to create customized layouts from within grid.

Makes those pesky garrison animations go away.

Displays bars depending on your professions

Allows you to loot BoP items without prompting when not in a group or raid

HealComm-2.0

Dropin replacement library for SetBackDrop

A frame with a text that gives you the amount absorb left on target, or in TankMode absorbs left on yourself.

Allows you to create icons, which can be customized greatly by user's input. CiR is more than just the usual cooldown tracker.

Allows combined aura detection. motw + gotw, all 4 mage int buffs, etc. in one status.

CleanShot

Simple oRA3 Maintank Target Frames, based on oUF

Data broker for keeping track of your Ankh cooldown.

Provides data about all artifacts in the player's possession.

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

Tells you which blob to kill at the Yor'sahj encounter in Dragon Soul.

QR Code builder library

Reminds you to Life Tap and Dark Pact

Dailies Quest Tracker

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

Make it easy to explain bosses in Raids.