I like the concept.
The site has a lot of useful detail.

BUT

The download tab actually downloads the executable - I like to choose what I have appearing on my machines.
It scanned clean but I deleted it anyway.

BUT

There is a free guide link, which has a form to request the guide.
I thought I then see an example of the products code; the forms are in IFRAMEs

SO

I followed one's source to view-source:http://www.simfatic.com/forms2/ebook..._from_iframe=1
and viewed its source.
It was clean but relied on JQuery 1.7.2 without checking for other versions.
It uses other JQuery plug-ins as well so it's hard to see where the added value resides.

AND finally

It might not work.
Platforms: Windows® XP/Vista/7/8 with no mention of Windows 10.
€59 is probably fine for a one-man band but ongoing support is not mentioned anywhere.
Simfatic Forms is a desktop application that runs on Windows XP/Vista/7/8. The form processing code generated by Simfatic forms is in PHP. Your web server needs to support PHP (PHP 4.3.0 or above, including PHP 5 and above).
Please note that your website could be running under any platform ( Windows or Linux ). The only requirement is that it should support PHP.
PHP( http://www.php.net ) is a free, open source server-side scripting language.
That said for unlimited use, it would pay for itself very quickly.

Acorn