WowAce

In-game EPGP guild helper, supports standby, main/alt shared pools, minEP, offpecGP. Fixed price list with progress multiplier.

Inventory Management with virtual bags divided into sections.

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

Show the appearance of an item when you mouse over it

Dog-themed unit frames. Woof. Arf. Yip.

Point to quest POIs on your minimap

Show item levels in the character frame

Postal: Enhanced Mailbox support

Food/water macro generator

Modular casting bar.

Makes the default frames moveable via simple drag and drop

Drop the cheapest thing you're carrying

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

Entertaining kill-shot notification.

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