VTBuilder 1.53 can be downloaded from our software library for free. The actual developer of the free program is Virtual Terrain Project. Our built-in antivirus checked this download and rated it as virus free. The file size of the latest installer available is 18 MB. The program lies within Photo & Graphics Tools, more precisely 3D Design.
From the developer:
Virtual Terrain Builder is a tool for viewing and processing many kinds of geospatial data. You can load any number of elevation layers, combine or resample them, import and export elevation grids, select, move and delete buildings, reproject and offset, import several image formats for viewing in conjunction with other layers, and more.
You may want to check out more software, such as Autodesk Civil 3D Object Enabler, Smart Map or stCAD, which might be similar to VTBuilder.