WowAce

Kiwi Plates

DotDotDot

KoS-Management Tool

Shows Status Bars that you can drag around and group up for your cooldowns

A Data Broker display for combat statistics.

A sexy logarithmic cooldown bar

Piece of mind by being one with your class.

KillingSpree

Desesperated announcing to clearly show the skillings of act inplay.

Displays the time remaining before your (temporary) pet is dismissed.

Broken in Midnight. I recommend MidnightFocusInterrupt instead.

Alternate Rune Display

Entertaining kill-shot notification.

Mutt (Macro Update Target Tool) provides slash-commands that can patch the predefined targets in your macros.

Monk Brewmaster/WindWalker Priority and Buff/Debuff Tracking Tool

Helps you decide which ability to use next according to priority you set

Raid level alternative player power warning (Atramedes, Cho'gall, Lord Rhyolith)

Estimated time until current target will die.

Gathers statistics on certain chance-on-use spells, also known as procs.

Reorients the camera to be behind the character after a charge.