at first let me say that Cartographer is on of my very favorite addons. I was a long tome MetaMap user but Cartographer is simply perfect for my needs. Perfect? Nearly. :)
I am looking for a very nice feature that is available to Atlas as an addition: AtlasQuest (info and download)
This addon shows all available quests for an instance with lots of info to them (where to get the quest, loots etc.). Unfortunately it is only available as an plugin to Atlas at the moment so imust have Atlas installed just for the use of this addon.