WowAce

Displays the remaing cooldown of the action you tried to use

Data Broker Display similar to FuBar

Estimated range display. Type /rangedisplay for config

A library to determine estimated range.

Broker plugin to display player orientation

Displays the time remaining before your (temporary) pet is dismissed.

For Developers (of Addons which uses LibWho-2.0): show queues and queries in realtime

Make the unit frame fade if out of range.

Show a bar indicating the remaining lifetime of your temporary pet