Goxel - Goxel is a simple, but powerful voxel graphic editor with 24-bit color support, unlimited scene...
Terragen - Terragen is a scenery generator, created with the goal of generating photorealistic landscape...
Makers Empire 3D - Voxel editor made to be easy to use.
Vue - Create vast expanses of terrains, add trees, select the best point of view and render...
Paint 3D - Paint 3D is a standalone graphic editing solution created by Microsoft.
DreamScape - Plugin for 3ds Max that creates skies, clouds, ocean waves, boat wakes, naval dynamics and terrain.