Here are some addons/services that are over looked by the average Carbonite user. Then again I use Armory anyway because of what it monitors. If you prefer mostly all-in-ones the Dugi kit doesn't look too shabby for questing, otherwise here's some minor tweaks one can use to alternate the play style.(I play demonology the way no other warlock would... without a demon.)
Warehouse =
Armory
Quest Tracker =
QuestGuru
Map = ....
Travel Routing =
TomTom
(TomTomLite does Archaeology tracking as an added bonus... if you dislike bloat.)
Quest Guides = wowhead.com, wowwiki.com, wowpedia.com, etc.(I was once called a wow pro.)
Minimap POI's =
QuestPointer