MagicaVoxel - A free lightweight GPU-based voxel art editor and interactive path tracing renderer.
Pixel Pix - Turn your photos into pixel art
Goxel - Goxel is a simple, but powerful voxel graphic editor with 24-bit color support, unlimited scene...
Voxel Builder - Design and edit 3D voxel models in your browser.
Cubik Studio - Model in a unique cubic style. Start modelization with boxes. Move, rotate and scale cuboids.
Da Vinci Eye - Learn to draw by using your phone to overlay images for you to trace