WowAce

Adds notes to item tooltips

Information display for Hunters.

A library to return spell duration and debuff type of a spellID.

Cartographer_Mailboxes

Adds an additional spell alert if you have more than one charge of a buff that is normally tracked by the in game spell alert...

Buff reminders and more

MiniPet, Always keep your little companion with you, based on the work of Carra.

FuBar_CombatTimeFu

Quest helping: fetching items to use, that sort of thing.

Keeps track of time played and rested XP across your characters.

Makes your item stats shine!

Simple, nice-looking power bar addon for all classes.

Shared handling of media data (fonts, sounds, textures, ...) between addons.

Timerbar embeddable library

Bidder for DKP points. Usable as standalone bidder, or with DKP - Manager to manage points.

Tracks whispers and conversations

View any characters bank and bags from anywhere. Stores items in Baggins submenu "Anywhere Bags."

Add TomTom Waypoints for Flight Masters in classic

A library to try to guess a level of a player.

RaidHelper