WowAce

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

Automatically enables or disables combat logging based on location.

Reno is a slash-command that can patch predefined options in a macro to change which actions will be chosen.

Mutt (Macro Update Target Tool) provides slash-commands that can patch the predefined targets in your macros.

Smooth combat HUD based on ArcHUD2

Displays information about the current zone on the World Map

A library to provide information about zones and instances.

Collects Herbs, Mines, Gas Clouds, Archaeology, Treasure and Fishing locations and adds them to the worldmap and minimap

Another HUD addon

PvE Status Frames

Uses various methods to scan your surroundings for rare or specified NPCs.

A library to provide unit-oriented tags to LibDogTag-3.0

Co-ordinated targetless Party and Raid wipe recovery. Evolved

Configuration for LibToast notifications.

Spawns toasts for looted items, money, and currencies.

A fancy LDB reputation display, show faction reputation and reputation change history

Bulk mail sending made really easy

Bulk mail reception made really easy

Dropdown library for Ace3 options, extensible to other options formats. Works ok.

Utility library with shared functions and data for various addons by NeoTron.