WowAce

Tankadin

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

Aggro Warning System for Parties and Raids.

LibRockModuleCore-1.0

Adds a cooldown timer for Nezir's Ice Patch ability.

Bag and item management utilities

Grid module to emphasize units based on some configured conditions.

Adds easier gear switching to FuBar.

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

Plays amusing sounds whenever you skin a mob

Shows attachment count in Inbox icon.

Simple embeddable publish-subscribe implementation.

MorgBid

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

Show a bar indicating the unit's Soul Shard count.

Echos quest objective completion to your party

Invite lots of players in the raid browser for world boss groups

ArenaHistory

FuBar_PitchFu

Adds a third text indicator to Grid.