WowAce

Adds your damage to Scrolling Combat Text

Adds manabars to the sides of Grid frames.

Tracks the precise arrival & departure schedules of boats and Zeppelins around Azeroth and displays them on the Mini-Map and ...

Adds Archaeology items to AdiBags virtual groups

UnitActionBars

A simple slash-command-based addon for querying item information from the Blizzard servers via ItemIDs and SpellIDs.

New/Old BG indicator, Join by ID, Quick Leave Queue, etc.

ItemPriceTooltip

HUD that you can tweak the way you want.

PT3Bar

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

Tracks SendAddonMessage Spam

Keeps track of space left in your bags.

Collect data about you myth+ challenges

A data broker display, that shows one block per plugin.

FuBar_ItemBonusesFu

Gathers statistics on certain chance-on-use spells, also known as procs.

SRA

Animated target indicator

Estimated time until current target will die.