WowAce

Acolyte2

Database of item upgrade IDs

Display the global cooldown around your cursor. (+ other stuff)

Assister

SanityItemCache

Gives detailed descriptions of particular localities, as zones or instances, and provides optional TomTom integration.

Adds a button to your character and inspect window that shows a summary of gear enchants and gems.

RBM

Replacement for default bags.

Cartographer_Treasure

Customizing your buff display

This will keep track of how much you have paid per item in your inventory. Only one of (Auctionator, Auctioneer, AuctionLite,...

Keeps track of your reagents for buffing.

Simple display and management of Away / AFK / Busy / DND status via broker or minimap

A Library for stat conversion, calculation and summarization.

Shows the health of the player's current bodyguard.

mHud

Control screenshot format and quality via LDB displays

Accelerates Camera Zooming

AceBuffGroups