Blender - Blender is the open source, cross platform suite of tools for 3D creation.
MagicaVoxel - A free lightweight GPU-based voxel art editor and interactive path tracing renderer.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
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.