WowAce

Shows optimal target to use various area healing spells

Simple, nice-looking power bar addon for all classes.

Avion

RoleCall allows you to easily see the talent specs and roles of everyone in your group.

GridStatusIncomingHeals

Shows you which bosses you've killed next to the raid finder frame.

Track any items you want in a tooltip

Party Ability Bars

Provides training reminders to help decipher the Blizzard Spell Alerts.

TuiRaidTracker

A fully featured library tracking all ongoing absorb effects

Clean looking square minimap with many options.

Dropin replacement library for SetBackDrop

Displays a grid of guild ranks versus permissions.

Spawns toasts for looted items, money, and currencies.

Don't underestimate your little critters!

wRlog

Automatically sells low quality gray items and selected white items to the vendor.

Allows customisation of login/logout system messages.

Gives equipped and overall iLvl to indicate the quality of a character's gear.