Weapons that are +6 or greater give additional attack speed.
Insane Reaper (an evie sp skill) at rank 9 or greater increases attack speed.
The enchant scrolls Pride, Valor, and Blood Lust (as well as others i don't remember) all increase attack speed to the weapon it's used on. Enchant scrolls typically cannot be found until at least level 50.
Certain lv 61 weapons start with a faster attack speed. For example, all of the weapons in the Dreamwalker set start at +9 attack speed. --- -gejsiv- :/ It cost four hundred thousand dollars to read this signature for twelve seconds.