Blender
Blender is a free and open-source 3D computer graphics software tool set used for creating animated films, visual effects, art, 3D-printed models, motion graphics, interactive 3D applications, virtual reality, and, formerly, video games.
Availability
Blender is free to download on Windows, MacOS, and Linux platforms here. Basic tutorials to get started on Blender are available at https://www.blender.org/support/tutorials/.
Support (U)
For help with Blender, visit their support page or visit their community page for more help.