WowAce

Barks at you when you target a crowd-controlled unit

Manages tracking of raid attendance, loot, and more.

Nihilum Raid Tracker, originally written for the EU guild Nihilum.

Attach diminishing return icons to unit frames.

Utility library with shared functions and data for various addons by NeoTron.

LibItemInfo-1.0

Shows Status Bars that you can drag around and group up for your cooldowns

TrackingBar

Blocks Chinese Chat

Dropdown library for Ace3 options, extensible to other options formats. Works ok.

Broken in Midnight. I recommend MidnightFocusInterrupt instead.

A library that handles the basics of "window" style frames

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

Omnibus

Displays item durability and repair cost.

Allows tradeskill usage by clicking items or reagents.

Ace2'd version of the "Visor" frame-modifictaion AddOn. All code in this addon is copyrighted 2006 by its authors, which are...

Desesperated announcing to clearly show the skillings of act inplay.

VitalWatch

Tracks, transmits and displays the cooldowns of your raid.