WowAce

Draws some lovely 3D portraits in the standard Blizzard artwork.

Evaluates your gear

MobHealth

Displays events from Calendar for upcoming week in tooltip.

In-game EPGP guild helper, supports standby, main/alt shared pools, minEP, offpecGP. Fixed price list with progress multiplier.

Vengeance module for Broker displays.

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

Adds on-screen buttons for the farming tools and seeds.

FuBar_NinjutFu

Addon to switch all your AceDB profiles via slash command. This tool also allows you to emulate profiles for non AceDB addons.

Announces interrupts in the chat

FuBar_CharmsFu

Provides buttons and keybinds for raid flare world markers that never stop working mid-session

Modifies the inbox into a scrollable inbox, including open all options

Adds Friend and Guild options to the context menu of player units.

Quest helping: fetching items to use, that sort of thing.

Lexan

Whats

Allow rule based automatic rolling on loot.

Needja Tracker