WowAce

Lets you drag UI frames around

FuBar_PetFu

Makes tracking reputation much simpler. By InSo(v)nIaX

MonkeyPirate

Library to provide visual bar creation and management.

Cartographer_Stats

Keeps track of gold and cash flow across multiple characters

Replacement for the default nameplates.

Interface-central mount management

Calculates incoming damage avoidance and mitigation

Bag and item management utilities

Assist you with faction transfers letting you know which mounts, spells, etc you have and what they will be swapped to.

Converts incoming ALL CAPS CHAT into lowercase text.

Displays performance-related stats for shadow priests.

Improvements to the standard Blizzard Eclipse bar for balance druids. Use /ebp for the config screen.

SpoilsOfWar

Adds information to Titan Panel about your Professions and opens ProfessionsBook

Suppress chat messages when specified items are looted

Display and change minimap tracking modes from your FuBar.

Good looking, smoothy and helpful nameplates