WowAce

oUF layout looking like ag_Unitframes and Grid.

JostleLib

Hourglass

Spy on your guild.

Grid module to emphasize units based on some configured conditions.

Assist you with faction transfers letting you know which mounts, spells, etc you have and what they will be swapped to.

LDB display for Oak Interrupts Broker

Toggle Windowed Mode with click or keybind.

Interface-central mount management

Shows the price of a single item in the Auction House.

Bag and item management utilities

A simple, zero config, trash item seller

A Data Broker plugin to display how long you've been playing

SpoilsOfWar

BossList

A system config addon to WOW

Make noise when the servr is going to restart

GirlFriend

"Shows Call To Arms status in an LDB data provider."

This is an add-on to block incoming guild/party/duel requests (except for friends/party/guild) (previously ASSBlock)