WowAce

Continuation of Shadowed Unit Frames

New/Old BG indicator, Join by ID, Quick Leave Queue, etc.

Show a bar indicating the unit's Soul Shard count.

Takes a screenshot when you kill a boss or gain an achievement

Adds filtering based on your known professions.

CurseBar

Displays a table for possible outcomes of incoming hits with their probability

RaidMarshal

All Flight Masters, flight duration and more.

LDB addon to manage your addons

Shows attachment count in Inbox icon.

Pick Pocket Countdown Timer for Rogues.

Unit testing framework for World of Warcraft addon development.

Shows a frame to track your Pyrite debuff on Flame Leviathan and it's trash. Completely based on MalygosStacks by Nebula.

Simple raid waiting list

Keeps track of your reagents.

ReforgeSummary

Experiments in Mana/Regen Tracking

UIThing

On login, displays changes to your guild since the last time you logged in.