WowAce

Calculates optimal reforging for given weights/caps.

Helps you decide which ability to use next according to priority you set

Various libraries based on LCD4Linux, offering users lower-level UI customizations.

Square Minimap and more

Displays item durability and repair cost.

BiGOpt

Check the quality of wild battle pets

A lightweight addon that does something.

lern2count adds ABinfo castcounts to spell and actions. It has a builtin reagentcount too.

Building a Better Mailbox

Threat reactive nameplates for TidyPlates.

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

pDebuffList

HunterAEP

Provides database of quest giving npcs/mobs/objects for display on the World Map/Minimap

Helper functions used by my addons, feel free to use them in your addon too

Cartographer_Mining

Improve your barbershop experience with appearance profiles!

Stores a browsable database of spells that mobs cast

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