WowAce

AutoMagicly clicks though Daily Quests, and Turns them In.

Stores a browsable database of spells that mobs cast

Good looking, smoothy and helpful nameplates

CombatLog in SimpleCombatlog style

Lightweight time/date display with optional hourly chime.

Resizes some default UI frames (GuildUI, LootFrame, RaidInfo, TradeSkillUI and TrainerUI) to show more lines

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

Provides LibPeriodicTable-3.1 item filters for AdiBags.

Fancy up the ExtraActionButton frame

AspectsBar

FuBar_MicroMenuFu

Simple library that handles multiple levels of logging.

LDB display of currencies, gold totals and session / daily / weekly statistics for all characters on a server.

Announces interrupts in the chat

WhoDrop

A jukebox for playing wow embedded music.

Replacement for default bags.

Tracks interrupts

Displays friend notes in unit tooltips, at logon, and in /who results.

GonffBar