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!
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
World Creator - World Creator is a real-time terrain and landscape generator and creation tool, which is industry proven by many game, movie and artwork companies.
ZBrush - ZBrush is a digital sculpting and painting software solution.
Terragen - Terragen is a scenery generator, created with the goal of generating photorealistic landscape...
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.