Avastar
6.4#8 in 3d rigging software€18, paid onceLinuxmacOSWindows
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Avastar suits Blender users creating Second Life or OpenSim avatars, clothing, attachments, animations, developer kits, or non-human characters. Basic Blender knowledge is expected.
Houdini suits 3D artists and technical teams working in areas such as film, games, motion graphics, or synthetic data. Apprentice is an option for non-commercial learning and personal projects, with render limits to consider.