The latest version of the Nifskope tool, I've uploaded it here so that the rest of the team has easy access to it. This tool allows you to create TES-friendly material under the .nif format.
A graphical program that allows you to open NIF files, view their contents, edit them, and write them back out again. You can use it to quickly make changes to specific properties of a NIF file such as changing the texture, adding translucency, and more. A 3D view of the contents of the NIF file allows you to preview your changes instantly. You can even create texture templates, and import & export OBJ files.