It contains a lot of useful functions no matter which spec you are.

Floating Combat Text of awesomeness. Caw. It'll eat your crackers.

Scans your mini-pets and mounts and provide a check list for what you're missing.

OPie lets you group actions into rings which appear when you hold down a key.

Addon that tracks your raid's cooldowns, and displays them using configurable buttons or bars.

RSA is an addon that can announce spell casts to various chat channels

Keybinding UI for Items, Spells and Macros.

Genie helps you organize your bags, bank and/or guildbank

UnitFramesPlus (UFP) is a simple addon to enhance Blizzard unit frames.

The addon lets you create as much action bars as you want.

One-key solution for mounting/dismounting, supports spells, shapeshifting.

Interface for running a Loot Council.

Powerful Class AddOn for Raiders.

Numerical & customizable display of current combo points.

GnomishVendorShrinker creates a simple, compact vendor frame.

Changes the look of the default UI.

Makes it easier to earn dungeon and raid achievements.

Saves your normal and critical records and flashes a message if you break the record.

TriviaBot allows the user to host quiz games for other players.

iShadow adds shadowed border to the UI window.

EBB adds groups of bars to your screen showing you which (de)buffs currently affect your char.

Paste is a small utility that enables multi-line/unlimited-length pasting of text or commands into WoW

PvP timer and cool down tracking mod.

See every combat log event that led up to a player's death.