WowAce

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.

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

Universal Library Stub

Callback handling Library, normally embedded inside other libraries

Handy notes for your maps

Simple and Advanced combined - Bartender4 ActionBar AddOn

A library for transmitting and receiving durability information of players in your group.

Compression and Decompression library

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

UIFrameFlash to Animation conversion library for Floating Chat Frame functions.

Toss those bugs inna sack.

Grabs bugs for the bug sack.

Enables AceGUI-3.0 widgets for the 5 basic SharedMedia-3.0 types

Postal: Enhanced Mailbox support

LibDataBroker-1.1

Chat addon, filtering messages and UI changes

Modular casting bar.

Timer bars with that extra sweetness.