MagicaVoxel - A free lightweight GPU-based voxel art editor and interactive path tracing renderer.
Percolator - Percolator: the always fun, supremely unique photo app that is sure to surprise you! FEATURES:
Cubik Studio - Model in a unique cubic style. Start modelization with boxes. Move, rotate and scale cuboids.
AndreaMosaic - With AndreaMosaic you can create your own photographic mosaics made with your own pictures.
Goxel - Goxel is a simple, but powerful voxel graphic editor with 24-bit color support, unlimited scene...
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.