There was a download of Imatest 3.8 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions among the program users are 3.8, 3.6 and 3.5. The actual developer of the program is Imatest LLC. The software belongs to Photo & Graphics Tools. We recommend checking the downloaded files with any free antivirus.
From the developer:
To Install Imatest, locate the downloded file in Windows Explorer, double-click on it, and follow the instructions. There is no need to uninstall the previous version for upgrades. A description of releases can be found in the Change Log.After that time you will need to renew your subscription.
You may want to check out more software, such as PCLoupe, Hexacolor or Resize-O-Matic, which might be related to Imatest.