WowAce

Keeps track of gold and cash flow across multiple characters

Keeps track of time played and rested XP across your characters.

A library to try to guess a level of a player.

Gives a score for your kit allowing easy comparison with others, also colour codes kit based on appropriateness for your level.

FuBar_jabberFu

CBRipoff

Simple money display for LDB

DarkCandy

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

FuBar_PetFu

Saves contents of your guild bank and sends/receives updates over the addon channel

Add TomTom Waypoints for Flight Masters in classic

DelMapa

Go quick, or go home!

Ghost: Pulse

Target assistance by automatic rewriting of macros

Quickly assign the highest follower to each building or unassign all of them.

Shows who controls Wintergrasp and the time until the next battle.

Dailies Quest Tracker

Customize the PlayerPowerBarAlt display