I don't know if this addon is in existence but I'm looking for something that takes Your current stats such as str stam agil int and spirit along with hp armor mana dmg (ranged and melee) and has a drop in interface so you can Drop a non soulbound item into a specific slot and see how it effects your stats/dmg/hp with out the need of making the item soulbound. I think this would be insanely useful to figure out what to sell and what to wear. Please and thank you for any redirection to addons in existence or making of this addon.
Hope to see this idea spring into life. If I could make this myself I would but I'm not that skilled.