WowAce

A seperate focus bar, with focus gain prediction and rotation forecast.

KC_Mobility

Opens professions and shows their skill level.

LFD status via a DataBroker display rather than the minimap.

Keeps a list of all items you want and shows how much you need.

Shows a window displaying any raid member below 10,000 health during the Chimaeron encounter.

BankItemsFu

Keeps track of time played and rested XP across your characters.

FuBar_RLAssistFu

Displays a grid of guild ranks versus permissions.

Whats

Keeps track of gold and cash flow across multiple characters

BossList

FuBar_NetStatsFu

Calendar improvements

Filters AFK and DND messages after you've seen them once.

Hunter pet manager for any DataBroker(LDB) display.

Replacement for WoW's flash/fade functions.

Records mail when visiting the mailbox to make keeping track of mail and expiration dates easy.

Prompts for canceling of pet battles if no rare pet is found in the opposing team.