WowAce

TGuildFrame

Calculates incoming damage avoidance and mitigation

GonffBar

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

Spawns toasts for looted items, money, and currencies.

ChatHighlighter

KC_PlayerFramePlus

eePanels2

Keeps track of your reagents.

Forces LSM and LibSink to use specific textures and sinks.

Provides extended aura status settings.

Fizzlebag

PlayerNotes

Adds a Friendly Fire mode and data collection to Skada.

Makes those pesky garrison animations go away.

Merchant, gossip and taxi tweaking module for TweakHub.

Lightweight time display, with micro menu and memory usage tooltip.

FuBar_CraftTimersFu

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

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