WowAce

A Data Broker display for combat statistics.

aUF_RangeCheck

KillingSpree

DotDotDot

A simplistic clock.

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

Estimated time until current target will die.

Replacement for default bags.

NBuffBars

A library to return spell duration and debuff type of a spellID.

Buffalo

Fade Blizzard Raid Frames

ShadowGreenLight helps you decide if recasting SWP/Corruption is worthwhile

Configuration library

Swiss Army knife for instances, including player tracking, ignore buttons, loot tracking, notes, and more.

Allows the user to customize the the tooltip with lua-scripts

Pet Theory

Keeps track of space left in your bags.

Provides LibPeriodicTable-3.1 item filters for AdiBags.

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