WowAce

A powerful, comprehensive utilty for displaying graphics and information based on buffs, debuffs, and other triggers.

Allows addons to easily create a lightweight minimap icon as an alternative to heavier LDB displays.

AddOn development framework

Shared handling of media data (fonts, sounds, textures, ...) between addons.

Simple and Advanced combined - Bartender4 ActionBar AddOn

Handy notes for your maps

UIFrameFlash to Animation conversion library for Floating Chat Frame functions.

Afflictions display and cleaning for solo, group and raid with advanced filtering and priority system.

Timer bars with that extra sweetness.

Scan for rare mobs so you can find them and their loot

Grabs bugs for the bug sack.

Toss those bugs inna sack.

Chat addon, filtering messages and UI changes

HereBeDragons is a data API for the World of Warcraft mapping system

Adds spec switching support to individual AceDB-3.0 databases.

Tracks rare drops, including companions and mounts

A Replacement for standard UIDropDownMenu

Postal: Enhanced Mailbox support

Give whispers an instant messenger feel.

Makes the default frames moveable via simple drag and drop