This simple mod allows all STANDARD Greatswords (not enchanted, not DLC, not custom) to be one handed. This means that they will level up the One Handed skill, and can be duel wielded. I am aware that whilst holding them the swords will look like their one handed counterparts, but I am yet to find a solution.

EDIT: Works now, found and fixed the problem, sorry for the inconvenience :) NO LONGER BEING UPDATED, CHECK STEAM WORKSHOP FOR LATEST VERSION!!!