This page needs help! Please submit any missing information via GitHub issues or pull requests.
Blender is a free and open-source 3D modeling, animating, and rendering toolset. While it has always been possible to transfer assets between 3D software, Blender is a relative newcomer to direct Halo modding workflows, which traditionally relied on the closed-source paid 3ds Max. Thanks to community-made plugins, it is now possible to use Blender exclusively.
Note that modern Blender 2.8+ is the preferred version, as this will work with available exporters.