WowAce

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

AddOn development framework

Universal Library Stub

Callback handling Library, normally embedded inside other libraries

Compression and Decompression library

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

Grabs bugs for the bug sack.

Toss those bugs inna sack.

Handy notes for your maps

Postal: Enhanced Mailbox support

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

Simple and Advanced combined - Bartender4 ActionBar AddOn

Library that handles chat output.

A modular, lightweight and screen-estate saving grid of party/raid unit frames

A library allowing for easy creation of graphs

Modular casting bar.

Does stuff for sachmo

An intuitive keybindings library.

A library to help with localization of the output of UnitCreatureType.

Allows you to view all items from all your characters on the same account, when-ever and where-ever you want.