WowAce

Redirect character errors, system messages and information messages.

Timer bars with that extra sweetness.

UIFrameFlash to Animation conversion library for Floating Chat Frame functions.

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

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

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

A library for transmitting and receiving latency information of players.

Library that handles chat output.

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

Toss those bugs inna sack.

Grabs bugs for the bug sack.

AddOn development framework

Provides the /in command for delayed execution.

Modular damage meter.

A core for your informational plugins to plug into.

Friends & Guild Data Broker plugin.

A total number of quests Data Broker plugin.

Zone text Data Broker plugin.

A FPS Data Broker plugin.

Remaining and rested XP Data Broker plugin.