WowAce

Officially the original source for where things are in the Broken Isles, in HandyNotes

The original source for where things are in Pandaria

Officially the original source of knowledge of where things are in Draenor during Warlords, in HandyNotes

The original HandyNotes source for where things are in Battle for Azeroth

Track time played, rested XP and money for all characters

Questing minion

GrindStatus

Keeps account of attendance and loot for raids, parties, bgs, arenas and solo for questing.

Drop the cheapest thing you're carrying

Bayi's Extended Questlog

Switch macro depending on zones or BigWigs boss modules.

AutoMagicly clicks though Daily Quests, and Turns them In.

tracks and share quests between your party

Keeps track of quests.

Shows your standings with the factions.

A Collection of Automations and Interface Tweaks.

Quest History tracker and shows lists of quests in each category

QuestLog

Point to quest POIs on your minimap

HideTalkingHead