WowAce

Various libraries based on LCD4Linux, offering users lower-level UI customizations.

SysMon plugin for any DataBroker display.

Simple and rich Death Knight rune customizations

Guilder brings common guild-raid tasks together in one convenient place.

Announces interrupts in the chat

Tracks skill and tradeskill costs and progressions, as well as trainer locations.

A threat main view module for Recount

Angry Raid Points Client

Tracks profession specific cooldowns and items across all your characters

Instant PROC notification

Visual loot monitor

A library to track nameplates.

FuBar_HonorFu

Square Minimap and more

Fubar_ChannelWatchFu remade for Broker

Provides data about all artifacts in the player's possession.

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

Some handy events that should exist in the default UI

Enhancer

QuestAnnouncer