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!

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.

Terragen - Terragen is a scenery generator, created with the goal of generating photorealistic landscape...

Hexagon - Hexagon - Box Version

Geomorph - Geomorph is a height field generator and editor for the Linux operating system.

DreamScape - Plugin for 3ds Max that creates skies, clouds, ocean waves, boat wakes, naval dynamics and terrain.