WowAce

Helps to track outgoing mails

Mob respawn timers

Interface-central mount management

Replacement of build-in loot frame

Keeps an eye on someone's distance from you, and alerts you if they get too far.

Calculates incoming damage avoidance and mitigation

ClassColors

A library to provide tools for formatting money and time.

One Click Forced Exit / Logout / Reload UI button for Broker

A simple addon that warns you if your pet isn't attacking while you're in combat.

LibRockComm-1.0

Provides quick notification (sound and visual) of your tanking status of your current target. Meant for tanking.

Add lines to ore and gem tooltips that show prospecting sources/results.

Display who crossed the charges on Thaddius

Simple, nice-looking power bar addon for all classes.

LootWhore

AutoFIR

It's a doodle pad for doodling with doodles.

Adds tier set number and difficulty indicators to tier item tooltips.

Holy Power, Shadow Orbs, Rogue Combo Points and Monk Chi.