Downloading ITSdesign 7.1.1.11 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the software is Innovative Tank Solutions, LLC. The software lies within Photo & Graphics Tools, more precisely 3D Design. The following versions: 7.1, 6.1 and 5.1 are the most frequently downloaded ones by the program users. We recommend checking the downloaded files with any free antivirus.
From the developer:
ITSdesign is a visually-oriented tank design program. Being comprehensive and easy-to-use, it helps design AWWA D-100-11 water storage tanks and API-650, 12th Edition fuel storage tanks, both in US and SI units. With ITSdesign, time-consumption and variables are reduced.
You may want to check out more software, such as graphite or Drawing Register Professional, which might be related to ITSdesign.