TracTrix 7.0.17317.1 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. TT2000.exe, TTV5.exe, TTV6.exe and TTV7.exe are the most frequent filenames for this program's installer. We recommend checking the downloaded files with any free antivirus. The most popular versions of the software are 7.0, 6.6 and 6.5. The actual developer of the program is Trix Systems AB. TracTrix is included in Photo & Graphics Tools.
From the developer:
TracTrix lets you to view, mark up and compare drawings. Using this program, you can open scans, CAD and PDF files. You can also convert the files to PDF and email them directly from this application. You can use the Automatic Drawing Comparator that highlights changes between different versions of the files.
You may want to check out more software, such as Win4D Advance or FRED Optical Engineering Software, which might be related to TracTrix.