WowAce

Mutes various chat related annoyances while in capital cities and instances.

Open all your mail

manipulate the minimap in numerous ways; move, scale, skin.

In-game EPGP guild helper, supports standby, main/alt shared pools, minEP, offpecGP. Fixed price list with progress multiplier.

Highly-configurable shield / absorb tracker.

Simple library that handles multiple levels of logging.

RaidAgent

Standalone of FuXPFu - Now sticks to anything!

UnitActionBars

Litmus

Library handling communcation for Magic* addons

Shows simple Buttons for your Cooldowns :)

Manufac

Adds unreal tournament style sounds to PvP encounters.

Adds a highlight border to items in your MogIt Wishlist, making them easier to see.

Mutt (Macro Update Target Tool) provides slash-commands that can patch the predefined targets in your macros.

Adds your name to chat messages

Broker plugin to display player orientation

Priority 3 loot announce addon

KillingSpree