WowAce

Durability Data Broker plugin.

A 'channeling spell'-tracking addon for Affliction Warlocks. Drain Soul, Drain Life/Harvest Life and Malefic Grasp.

Broker launcher that switches specializations when clicked. Also hides spell learned spam.

JostleLib

Disease Tracker for Death Knights.

Automagically call who should cross over

World of Warcraft Classic addon to display current zone information.

Calculates incoming damage avoidance and mitigation

Adds on-screen buttons for the farming tools and seeds.

Save and load macros.

DHUD2

Provides buttons and keybinds for raid flare world markers that never stop working mid-session

Shows where the equipment of inspected users or yourself is from.

Bidder

Allows for easy congratulating when someone earns an achievement.

FuBar_PetInFu

Dedicated to Lazybones of EU Khadgar who had the original idea as he can't find a damn thing in his bags. You're a great guy...

Adds item values to chat messages.

Fancy up the PlayerPowerBarAlt frame

GonffBar