WowAce

Check the consumable usage of your raid

Loot Distribution System

Show extra information about Jewels and Enchants in tooltips.

Rep2 displays a message, which shows how much reputation you gained, and how much is needed until the next standing.

This will keep track of how much you have paid per item in your inventory. Only one of (Auctionator, Auctioneer, AuctionLite,...

Displays online guild mates.

TabletLib

Provide plenty of links

Reorients the camera to be behind the character after a charge.

Pins on the World Map for quests you have not completed yet

World of Warcraft Classic addon to display current zone information.

Combat log evolved.

FuBar_ItemListFu

Some handy events that should exist in the default UI

Fubar_ChannelWatchFu remade for Broker

FuBar_RegenFu

Jigsaw

Displays the time remaining before your (temporary) pet is dismissed.

A jukebox for playing wow embedded music.

Reno is a slash-command that can patch predefined options in a macro to change which abilities will be chosen.