WowAce

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

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

AddOn development framework

Universal Library Stub

Callback handling Library, normally embedded inside other libraries

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

Compression and Decompression library

UIFrameFlash to Animation conversion library for Floating Chat Frame functions.

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

Timer bars with that extra sweetness.

Adds spec switching support to individual AceDB-3.0 databases.

A Replacement for standard UIDropDownMenu

Library providing multi-column tooltips.

A library for transmitting and receiving latency information of players.

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.

Database of item upgrade IDs

Library that handles chat output.