WowAce

Monitor the remaining duration on your Mysterious Eggs and other perishable items.

quick quest turnin and acceptance with a shared keybind

Show vignette icons sooner

Quest library for mob location and other information

LDB data source displaying rested XP for whole account

Dailies Quest Tracker

Dedicated to Lazybones of EU Khadgar who had the original idea as he can't find a damn thing in his bags. You're a great guy...

Note + rep tracking for players, with guild data sharing.

Shows your standings with the factions.

WQA helps you find world quest groups easily. Works after the 4/28 group finder changes.

View party member quest logs

Should I send that recipe to my alt?

Notifies you of experience gains

Adds a button to the quest completion interface which allows you to auto equips selected quest Item after completion

LibDataBroker plugin showing some random XP related data

Quest helping: fetching items to use, that sort of thing.

OneChoice tries to help you reduce quest reward choices down to, ideally, one choice.

A module that lets you find out what today's dailies are without having to visit the quest givers.

Keeps track of time played and rested XP across your characters.

Quickly builds /target macros for immediate use.