WowAce

A powerful, comprehensive utilty for displaying graphics and information based on buffs, debuffs, and other triggers.

Point to quest POIs on your minimap

Drop the cheapest thing you're carrying

Show what quests have changed

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

AddOn development framework

Tracks Raid/Instance/World Boss lockouts for all your characters, daily/weekly quests, currencies, trade cooldowns, and more!

Scan for rare mobs so you can find them and their loot

Show item levels in the character frame

Displays information about the current zone on the World Map, for WoW TBC Classic

Good old LibTourist-3.0 for WoW Classic Cataclysm

Entertaining kill-shot notification.

Makes the default frames moveable via simple drag and drop

Restores access to removed interface options in Legion

Tracks rare drops, including companions and mounts

Another HUD addon

A skinning engine for button-based add-ons.

Adds spec switching support to individual AceDB-3.0 databases.

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

Modular casting bar.