WowAce

ArenaMaster

Quest library for mob location and other information

Save and load macros.

Timerbar embeddable library

Lag tolerance module for Broker displays.

Adds a button to your character and inspect window that shows a summary of gear enchants and gems.

SysMon plugin for any DataBroker display.

Save and send chat messages to many channels. Allows quick item and profession linking within your messages.

Quixote

A volume control for Data Broker.

Shows where the equipment of inspected users or yourself is from.

Capital Cities NPC Browser

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

Display the global cooldown around your cursor. (+ other stuff)

Shows a nice Soulstone Monitor.

Sheppard

Collect data about you myth+ challenges

SinkLib

Automatically sells low quality gray items and selected white items to the vendor.

AceBuffGroups