WowAce

Calculates incoming damage avoidance and mitigation

Displays oRA3 main tanks.

Provides the the health and target of by an unit targeted mob (meant to be used for tanks).

Tank statistics Data Broker plugin.

Aggro Warning System for Parties and Raids.

Displays a table for possible outcomes of incoming hits with their probability

Resolve module for Broker displays.

Show helper indicators for units conditions (buffs, states, etc).

Times your instance runs. Aim for a new record!

OneHitWonder

Displays how much your Shield Barrier will absorb if it is used at any given moment.

Displays an animated bar with next enemy swings

Caser

Show a relative threat bar.

Flashes Health bar when life drops under a specified percent.

Auto-assigns raid targets to group member's crowd control abilities

Tracks who in your raid/party has Vigilance

Add a threat display to nameplates

Measures your TPS

A simple visual combat log with spell/skill icons for Classic WoW