WowAce

Target Debuff monitor. Stacking aware, giving current and potential debuff status.

Tracks SendAddonMessage Spam

A replacement tradeskill window for Classic

Death analysis tool

GrindStatus

A library to provide a clean dropdown menu interface.

View bank, inventory, mail, equipped and guild bank contents from any character anywhere!

Point to quest POIs on your minimap

Compact & customizable filtering, monitoring and grouping of buffs and debuffs

Track all threat redirection ability transfers and cooldowns (Misdirection and Tricks of the Trade).

Compact rune and proc display for Death Knights.

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

Database of Diminishing return categories and general data

An auction house AddOn to make the life of each fence easier.

Says random things in chat when casting any spell or ability. Type "/ss help" for the user's manual.

Friends list improvements: notes, remembering the information of offline friends, friend list syncing and backups, and a fuba...

A collection of useful (guild management) tools and utilities for smarter than average bears.

Dynamic item DKP calculation

A simple interface for unitframe click casting.

Attach diminishing return icons to unit frames.