Download of TopoDOT 8.0 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This software was originally designed by Certainty 3D.
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. The most popular versions among the program users are 8.0, 7.1 and 6.2. The software is included in Photo & Graphics Tools.
From the developer:
TopoDOT is a CAD program for extracting features, topographies, and 3D models from LiDAR system data. You can use TopoDOT tools to quickly find clearance measurements or monitor structural movement in any of your projects. It also helps you extract road lines, building footprints or other features comprising a baseline reference of the project.
You may want to check out more software, such as graphite or Drawing Register Professional, which might be similar to TopoDOT.