WowAce

Embeddable chat throttling library with traffic shaping and priorities

Adds on-screen buttons for the farming tools and seeds.

Captures chatframe Tradeskill Links for later reference in an easy to read format

Lag tolerance module for Broker displays.

View party member quest logs

Allows you to create icons, which can be customized greatly by user's input. CiR is more than just the usual cooldown tracker.

Heal and decurse by clicking on customizable raid/party unit frames

EasyDKP

Show a texture on demand

SRA

Auto sizes frame layout depending on group/raid size or predefined zone data

Buffalo

GemList

MultiTips

DynRepBar

A Data Broker plugin to show AddOn memory usage.

Adds options to create customized layouts from within grid.

Simple and clean Death Knight displays

CharScanner scans Basic Character Data, Talent Specifications, Equipment, PvE/PvP Achievements, PvE Boss Kill Statistics and ...

Adds a couple of graph displays to Skada.