WowAce

Chooses the most expensive quest reward and vendors it when possible

Toggles quests and achievements tracking during boss encounters

When pressing Enter to type into chat, only the default channels are remembered (stickied), not who you last whispered. This ...

Allows you to customise which companions are chosen by the "/randompet" command.

Valuation

Libre

Displays an icon when you are not behind your target for positional attacks

Simple cloak/helm checkboxes in the Character frame

Grid-like skin for TidyPlates

BuffCheck

Vocal warning for Lava Wave for the Ragnaros encounter

cyCircled_Pooh

A simple xp bar that shows you the entire journey from 1 to max level

HTML containers for WoW

oRA2_PvPDetection

A Just for fun addon that converts money displays to show totals based off Harry Potter's currency system

Bio_Pulse

Displays the number of empty bag slots on your backpack icon, just like WoW Retail.

Bidder_ZSumAuction

Shown your shaman water and earth shield charges and Ritide cooldown as integrated bars in Quartz