WowAce

Shows the minimum durability of equipped items on the stats frame.

Replacement for the default nameplates.

Angry Boss Reminders helps raiders switch to the proper talents, glyphs, and gear for each boss during a raid.

Adds two icon indicators to each corner (total: 8 icon indicators).

Lexan

Embeddable chat throttling library with traffic shaping and priorities

DebuffEnough

Merchant, gossip and taxi tweaking module for TweakHub.

KC_PlayerFramePlus

Sneakily inspect how much gold your mouseover target has made so far.

FuBar_AssistFu

LibQTipClick-1.0

Displays a variety of useful stats for tanking

EUF is an enhance of wow original unit frames, provides hp with both value and %, and optional 3D portrait. Simple and Useful.

Adds information to Titan Panel about your Professions and opens ProfessionsBook

A death track window for Recount

Adds your damage to Scrolling Combat Text

Allows combined aura detection. motw + gotw, all 4 mage int buffs, etc. in one status.

A fully featured library tracking all ongoing absorb effects

TextSpy