Arcane University:Blender Niftools Addon
The Beyond Skyrim Wiki — Hosted by UESP
The Blender Niftools Addon is created by the Niftools team, and hosted on Github. For a download, see the releases page. It is intended for direct conversion between game-ready nifs and Blender, including geometry, shaders, skinning and collision. At the moment, it only supports Skyrim LE nifs, and does not support Moppv collision (i.e. non-convex).