QGIS - QGIS is a desktop geographic information system, or GIS.
Terragen - Terragen is a scenery generator, created with the goal of generating photorealistic landscape...
Mapbox - An open source mapping platform for custom designed maps. Our APIs and SDKs are the building blocks to integrate location into any mobile or web app.
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!
Google Maps - Find local businesses, view maps and get driving directions in Google Maps.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.