InfiniTerrain includes random terrain generation and rendering tools for game developers. The terrain generator uses "diamond-square" technique to generate beautiful terrains of any size.
Second, InfiniTerrain uses fast and efficient meshes to render the terrain. There are two terrain renderers included: The first one renders the world as a Heightmap. The second renders the world as a voxel terrain.
Both renders include custom controllers for moving around in the world as well as the ability to modify the terrain at runtime.