WowAce

Replacement for ActionButton_Show/HideOverlayGlow APIs

Arena unit frames

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

Provides one or many frames for dumping text into.

Creates and manages secure Action Buttons

Show item levels in the character frame

A library to help with localization of in-game subzone names.

Give whispers an instant messenger feel.

Officially the original source for where things are in the Broken Isles, in HandyNotes

Modular casting bar.

A library to help with localization of races.

A skinning engine for button-based add-ons.

Shared handling of alternate identity data between addons.

Replacement for the default UI's StaticPopup dialogs.

Restores access to removed interface options in Legion

"Debug" code free since '93!

The original source for where things are in Pandaria

A library to help with localization of bosses.

Library of compressed itemid sets.

Adirelle's bag addon.