WowAce

Tracks Raid/Instance/World Boss lockouts for all your characters, daily/weekly quests, currencies, trade cooldowns, and more!

Barks at you when you target a crowd-controlled unit

an embeddable library providing an abstraction layer for tracking and querying Blizzard's Nameplate frames with ease and effi...

In World of Warcraft healers have to die. This is a cruel truth that you're taught very early in the game. This add-on helps you influence this unfortunate destiny in a way or another depending on the healer's side...

Reno is a slash-command that can patch predefined options in a macro to change which abilities will be chosen.

Mutt (Macro Update Target Tool) provides slash-commands that can patch the predefined targets in your macros.

Simple and Advanced combined - Bartender4 ActionBar AddOn

Mutes various chat related annoyances while in capital cities and instances.

AddOn development framework

Postal: Enhanced Mailbox support

Give whispers an instant messenger feel.

In-game EPGP guild helper, supports standby, main/alt shared pools, minEP, offpecGP. Fixed price list with progress multiplier.

Achievements

Tracks the Blood Shield for Death Knights.

Collects Herbs, Mines, Gas Clouds, Archaeology, Treasure and Fishing locations and adds them to the worldmap and minimap

Collects Herbs, Mines, Gas Clouds, Archaeology, Treasure and Fishing locations and adds them to the worldmap and minimap

Wowhead Data dump for GatherMate2

Sorts the Wardrobe

Provides access to all Portal and Teleport spells on right click of one button.

Displays information about the current zone on the World Map for WoW Classic Era