3D point cloud and mesh processing software

CloudCompare is a 3D point cloud (and triangular mesh) processing software.
It has been originally designed to perform comparison between two dense 3D points clouds (such as the ones acquired with a laser scanner) or between a point cloud and a triangular mesh.
It relies on a specific octree structure dedicated to this task.
Afterwards, it has been extended to a more generic point cloud processing software, including many advanced algorithms (registration, resampling, color/normal/scalar fields handling, statistics computation, sensor management, interactive or automatic segmentation, display enhancement, etc.).