World Quest Tracker: https://mods.curse.com/addons/wow/world-quest-tracker
feature I was looking for was all world quests on one pane rather then having to hunt for every icon on every zone map. The dev nailed it. Excellent addon for showing all the relevant information in one place.
It does a lot of other small things but they are just extras with most being useful and some not so much.
Author is very active and updates frequently. Has some bugs but nothing critical. Just reload if one pops up.