WowAce

Try on different gear and see their total stats and their differences. In short, an ingame CT-Profiles-like addon.

Wowhead Data dump for GatherMate

Shows you a much bigger icon selection frame

Visualises healing.

Adds World Quests to the quest list

CT_RaidAssist style raid frames

Show item durability and quality in the character frame.

Library providing mappings between trade skill recipes, spells and created items

Show all the leyline taps in Suramar

Rebuff yourself with the mousewheel.

Shows simple Buttons for your Cooldowns :)

LDB display of currencies, gold totals and session / daily / weekly statistics for all characters on a server.

Automatically enables or disables combat logging based on location.

Checks your gear before bosses and yells at you if you're an idiot

Create panels for customizing your UI, sucessor to eePanels

Displays the remaing cooldown of the action you tried to use

Displays Instance Maps

Adirelle's unit frames, based on haste's oUF.

Displays online guild mates.

Quest History tracker and shows lists of quests in each category