I have not seen any item editors for D2:ED (or DKS), or any save editors period. People have mentioned using Cheatengine for stats / level / god mode, and IIRC there are trainers for that type of thing, as well. Editors modify data in the save file, trainers modify data in RAM that the game is using.
You can use the Developer Mode in the Divinity 2 Developer's Cut release to give yourself equipment or charms / enchantment formula, but AFAIK you can not otherwise create or modify equipment.