Terragen - Terragen is a scenery generator, created with the goal of generating photorealistic landscape...
MagicaVoxel - A free lightweight GPU-based voxel art editor and interactive path tracing renderer.
World Machine - Command powerful tools like erosion and advanced colormaps to create terrain heightmaps, meshes, and textures for your game or 3D scene. Download for Free!
Goxel - Goxel is a simple, but powerful voxel graphic editor with 24-bit color support, unlimited scene...
Cubik Studio - Model in a unique cubic style. Start modelization with boxes. Move, rotate and scale cuboids.
EarthSculptor - EarthSculptor is a realtime terrain height-map editor and paint program featuring an easy to use...