I've used both Carbonite Quest and QuestHelper, but for me both of those have turned out to be huge memory drains, so I dont use them anymore.
My combination of JasonQuest and QuestsFu gives me the tracking I need, and if I dont know where to go I usually find that in Lightheaded (with TomTom), or if all else fails I'll get MobMap to show it for me on the map.