The scripts in Blender for evenly reducing the number of points in a cloud.
Sampling using a voxel grid created around the object.The points that are located near the voxel middles are preserved by its optional transfer to the voxel middles. It allows us to spread the points evenly.
Sampling using concentric spheres, which are built around the beginning of the local coordinates of an object or inside voxels. It allows us to preserve the initial relative density of the points.