WowAce

FuBar_GrindFu

LDB display for Oak Interrupts Broker

Notifies you when you get aggro.

Aggro Warning System for Parties and Raids.

A simple addon that warns you if your pet isn't attacking while you're in combat.

MeleeFrame

LDB data source displaying character stats

Add in keybindings to place raid marks on mouseover, or the target if there is no unit being moused over

Reports the total threat on a mob at the end of combat.

A DPS Data Broker plugin.

Adds TargetIcon status to Grid2 (player / player-target).

Repairs your items automatically upon visiting a vendor.

Helps with interrupt notifications and announcements.

Display combo points for Arcane Blast debuffs

Manasurge

Adds a Friendly Fire mode and data collection to Skada.

Spell interrupt aid and announcement addon.

Prints combat duration to chat after each fight

Minimal KoS-list-addon

Custom minimalistic nameplates