said by Feralmordius:Deadly Boss Mods (Boss notifications)
Omen (Threat monitor)
Ovale Spell Priority (Rotation Help)
Bagnon (Bag management)
Postal (Post box tool)
WeakAuras (Rotation\Timer\Buff Help) - (Awesome but take alot of work to setup. Suggest downloading strings for your class)
CrapAway (Auto sells greys)
I also am a big fan of the spartan UI, but that is an entire UI change not just extra an addon. Look for more on curse and let curse manage them.
How do you like the Ovale? Is that one addon for all classes? Or are there multiple addons like there is for Spell Flash?