Coltop3D 1.8.9 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular version among Coltop3D users is 1.8. Coltop3D.exe is the most common filename for this program's installer.
Coltop3D lies within Photo & Graphics Tools, more precisely 3D Design. This program was originally designed by Terranum. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
From the developer:
Coltop3D is a full-featured software for the structural geological analyses of 3D point clouds. It is designed for the interactive analysis of geological structures from high-resolution LiDAR or photogrammetric 3D point clouds and digital elevation models at local and regional scale.
You may want to check out more software, such as Riptide, Win4D Advance or Abalone, which might be similar to Coltop3D.