WowAce

Auto sizes frame layout depending on group/raid size

Keeps track of instances you are saved to on your characters.

Grid status module that shows the remaining value of any effect tracked by AbsorbsMonitor

Track friends / enemies in a convienent window, with optional logging

Plays a sound when Ready Check fires

RBM_BlackTemple

BattlegroundFu for Broker

Displays the internal cooldown of Eclipse as a ClassTimer bar

Guild members

Raid cooldown assignments for healers

Adds PvP status to Grid frames.

Allows shorter slash command handling

Show sorted reputation-list on FuBar-tooltip.

Provides info about spell teaching items.

Dock

In-game Loot Factor (DKP) comparisons for Juggernaut

ManufacSnoop

Shows guild and system message of the day only if either one of them has changed since the last login.

Enables RatingBuster to calculate selected buff effects even if you don't really have them

PaintChipsLib