WowAce

Adds unreal tournament style sounds to PvP encounters.

FuBar_SoulJarFu

Displays a reliable cooldown timer for the Shaman Ascendance ability

Debuff Monitor: A Powerful & Configurable Raiding Tool

Lists and/or reminds people missing flasks or food buffs at every ready check.

Displays a variety of useful stats for tanking

BossWhisperer

Facilitate better communication for loot councils

Dropin replacement library for SetBackDrop

A Data Broker plugin to show AddOn memory usage.

Allows movement and scaling of class-specific resource displays

Broker launcher that switches specializations when clicked. Also hides spell learned spam.

BuffProtectorGnome

Resizes Blizzard raid frames, and adds additional options.

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

JostleLib

FuBar_CharmsFu

Simple, light-weight, LDB-enabled timer that tracks how long you spend in combat

KC_PlayerFramePlus

Rawrkitty