SIMAGIS is not a free application. It is a commercial program developed by Smart Imaging Technologies and you can acquire it from the official web page. Fill up the order form, click Submit and follow the provided instructions. For further information, use
+1 713 589 3500 phone number to get in touch with the Support team.
You might get a malware notification when accessing the link, but this is a false alarm as the site has been wrongly marked as malware. I have browsed it and it's working just fine.