WowAce

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

AddOn development framework

Universal Library Stub

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

Callback handling Library, normally embedded inside other libraries

UIFrameFlash to Animation conversion library for Floating Chat Frame functions.

A Replacement for standard UIDropDownMenu

Compression and Decompression library

Timer bars with that extra sweetness.

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

LibDataBroker-1.1

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

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

Adds spec switching support to individual AceDB-3.0 databases.

A library for transmitting and receiving latency information of players.

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

A library allowing for easy creation of graphs

Keeps track of group members and keeps an up-to-date cache of their specialization and talents.

Handy notes for your maps

Simple AceGUI3 dropdown item classes for font/statusbar/sound/etc.