WowAce

A library to help with localization of Archeology dig sites

Shows activity for hidden ChatFrames by making their tabs flash.

A Perl layout with oUF.

Quixote

Allows tradeskill usage by clicking items or reagents.

Complain about crowd control breaks.

Zone text Data Broker plugin.

Displays a grid of guild ranks versus permissions.

Niagara

Merchant, gossip and taxi tweaking module for TweakHub.

BankItemsFu

FelwoodFarmer

Doodle

Displays bars depending on your professions

Leveling guides for trade skill professions.

Hemlock

Deformat

Shows learned recipes of all characters.

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

A 'channeling spell'-tracking addon for Affliction Warlocks. Drain Soul, Drain Life/Harvest Life and Malefic Grasp.