The site where Two Worlds I mods used to be hosted, and where the utility Two Worlds Control Panel pulled them from, insidetwoworlds.com forums are no longer with us. These are from an old mediafire linked on Reddit. They're as-is, I don't know the proper way to install or manage mods for this game. But they were a pain to find, so I will ease that pain for future seekers.

The game was theoretically set up to make modding easier, but a community never really bit into it. So unfortunately it's mostly just aesthetics/skins. There's also a mod to display extra stats about enemies, one to add more loading screen variants and one that adds a player dwelling