WowAce

Good looking, smoothy and helpful nameplates

This is an add-on to block incoming guild/party/duel requests (except for friends/party/guild) (previously ASSBlock)

TMrecruit

Displays both Kalecgos and Sathrovarr the Corruptor hit points during the encounter.

An attempt at giving a complete overview of Arena battles

A data broker plugin showing your longest fight and your current fight time.

Lists Pots and Herbs you got on all chars and allows you to specify color coding

A Data Broker plugin to display how long you've been playing

Announce which globule to kill during the Yor'sahj the Unsleeping encounter.

Resizes Blizzard raid frames, and adds additional options.

Shows the group leader, raid assistants, and master looter in Grid.

Ignore more than 49 people, autoshared between your alts

SpellEventsLib

Adds indicators to the sides of Grid frames.

Cryolysis 3

Keeps track of important de-/buffs in a splash screen

Shows the spec of people around you in the tooltip.

SpoilsOfWar

Hunter 'Misdirection' activity and cooldown monitoring for raids/groups. 'Readiness' aware.

Keeps track of people who have recently sent you messages.