WowAce

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

Allows the user to preview and track their progress in the collection of various transmogrification appearance sets

Angry Raid Points

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

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

HUD that you can tweak the way you want.

Does stuff for sachmo

Tracks SendAddonMessage Spam

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

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

Displays information about the current zone on the World Map, for WoW TBC Classic

Deathknight Rune Display

Tracks the current Fear Ward's in the raid or party.

Compact rune and proc display for Death Knights.

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

A replacement tradeskill window for Classic

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

Set and manage character notes that are displayed in unit tooltips and /who results.

Good old LibTourist-3.0 for WoW Classic Mists of Pandaria

Attach diminishing return icons to unit frames.