WowAce

Disease Tracker for Death Knights.

Heads-up minimap display

Nudge

Recap

Reno is a slash-command that can patch predefined options in a macro to change which actions will be chosen.

Mapster's Minimap brother

Simple quest item bar.

Considers an item against all the items you have to determine whether or not it is an upgrade

AutoFIR

Quest helping: fetching items to use, that sort of thing.

A FuBar plugin to show Recount.

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

Collects, analyzes and presents information about the virtual economy.

FuBar_ReloadUI

Adds the toon name to the alert that your RealID friend has come online.

Fixes UI bugs

Simple, light-weight, LDB-enabled timer that tracks how long you spend in combat

Timerbar embeddable library

Good old LibTourist-3.0 for WoW Classic Mists of Pandaria

DeclineDuel