MagicaVoxel - A free lightweight GPU-based voxel art editor and interactive path tracing renderer.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Cubik Studio - Model in a unique cubic style. Start modelization with boxes. Move, rotate and scale cuboids.
ZBrush - ZBrush is a digital sculpting and painting software solution.
Voxel Builder - Design and edit 3D voxel models in your browser.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.