Goxel - Goxel is a simple, but powerful voxel graphic editor with 24-bit color support, unlimited scene...
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.
Sculptris - Sculptris: Enter a world of digital art without barriers.
Voxel - Voxel is a mobile ad platform that enables users to experience mobile apps before purchasing or installing them.
Misfit Model 3D - Misfit Model 3D is a 3D model editor that basically operates with triangle-based models.