there was a request for version 3 ( https://forums.nubuilder.cloud/viewtopic.php?f=13&t=8713 ) which I want to update and bring back to life.
I am all with sbigelow (in the mentioned post). Responsive seems good, as more and more people are not using desktop, but tablet or mobile devices to access data. Actually for me it might be the point of no return: I kind of need responsive design, as I expect people to use the application on their smartphone.
Say a company member is working out of office and needs to access the next customers address - how should he do that if the text becomes so small on his device? The much better solution would be a responsive design which allows the page elements to "flow". Larger screen - wider display, smaller screen - stacked above each other.
I tried the current version(nubuilder 4 / forte) and HTML5 objects, one for opening a DIV, then some other field, then a HTML5 object for closing a DIV. This did really not work

There are some cumberstones form implementation:
* Every object must have a label
* Every object must hav coordinates that fix it's position.
If you remove those two restrictions: You might introduce a pure HTML object that does not have labels, but instead HTML can be used to create DIVs and SPANs. This would enable the user to create somehting of a logic structure and use his preferred CSS framework for styling.
PS: Bulma Framework - https://bulma.io
Just my 2cents
Olaf