WowAce

MendWatch

Tracks profession specific cooldowns and items across all your characters

Shows the health of the player's current bodyguard.

Buffalo

FuBar_RecZone

Heads-up minimap display

aUF_RangeCheck

VersionChecker

Keeps track of space left in your bags.

Dropdown library for Ace3 options, extensible to other options formats. Works ok.

Add-on that allows you to setup and quickly switch between different profiles of your action bars

item2phpBB

Transcendence Monitor for Monks

Simple Spell Alert

Separate indicator for your HoTs with timer.

Monitors for friendly deaths and announces them as in Myth: The Fallen Lords

Pins on the World Map for quests you have not completed yet

Doublerightclick casting, autolure and sound enhancing

CBRipoff

Gives detailed descriptions of particular localities, as zones or instances, and provides optional TomTom integration.